diff --git a/concrete/dense.go b/concrete/dense.go
index 2ee56ede..96e9fdb5 100644
--- a/concrete/dense.go
+++ b/concrete/dense.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package concrete
 
 import (
diff --git a/concrete/densegraph_test.go b/concrete/densegraph_test.go
index f65797c4..e0a53b46 100644
--- a/concrete/densegraph_test.go
+++ b/concrete/densegraph_test.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package concrete_test
 
 import (
diff --git a/concrete/gonumgraph.go b/concrete/gonumgraph.go
index 919e2a5d..df865724 100644
--- a/concrete/gonumgraph.go
+++ b/concrete/gonumgraph.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package concrete
 
 import (
diff --git a/concrete/gonumgraph_test.go b/concrete/gonumgraph_test.go
index f9e5aaa5..90d125e5 100644
--- a/concrete/gonumgraph_test.go
+++ b/concrete/gonumgraph_test.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package concrete_test
 
 import (
diff --git a/concrete/tilegraph.go b/concrete/tilegraph.go
index 6588b1e9..af1dab37 100644
--- a/concrete/tilegraph.go
+++ b/concrete/tilegraph.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package concrete
 
 import (
diff --git a/concrete/tilegraph_test.go b/concrete/tilegraph_test.go
index 2822c20e..1878f37d 100644
--- a/concrete/tilegraph_test.go
+++ b/concrete/tilegraph_test.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package concrete_test
 
 import (
diff --git a/doc.go b/doc.go
index de5cd475..c32a736b 100644
--- a/doc.go
+++ b/doc.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 /*
 Package graph implements functions and interfaces to deal with formal discrete graphs. It aims to
 be first and foremost flexible, with speed as a strong second priority.
diff --git a/graph.go b/graph.go
index a2415b2a..2b704748 100644
--- a/graph.go
+++ b/graph.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package graph
 
 // All a node needs to do is identify itself. This allows the user to pass in nodes more
diff --git a/search/floydw_test.go b/search/floydw_test.go
index 2f388a2c..353e6bf4 100644
--- a/search/floydw_test.go
+++ b/search/floydw_test.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package search_test
 
 import (
diff --git a/search/floydwarshall.go b/search/floydwarshall.go
index d7f7b2cb..531ab767 100644
--- a/search/floydwarshall.go
+++ b/search/floydwarshall.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package search
 
 import (
diff --git a/search/graphSearch.go b/search/graphSearch.go
index a379aba2..7ac8bd83 100644
--- a/search/graphSearch.go
+++ b/search/graphSearch.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package search
 
 import (
diff --git a/search/internals.go b/search/internals.go
index 92e38c3c..67b75acc 100644
--- a/search/internals.go
+++ b/search/internals.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package search
 
 import (
diff --git a/search/search_test.go b/search/search_test.go
index 364b017c..81e1cfcb 100644
--- a/search/search_test.go
+++ b/search/search_test.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package search_test
 
 import (
diff --git a/set/disjoint.go b/set/disjoint.go
index 38b4f1a2..8885d687 100644
--- a/set/disjoint.go
+++ b/set/disjoint.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package set
 
 // A disjoint set is a collection of non-overlapping sets. That is, for any two sets in the
diff --git a/set/disjointset_test.go b/set/disjointset_test.go
index 45e44cfc..2c7a0cb5 100644
--- a/set/disjointset_test.go
+++ b/set/disjointset_test.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package set
 
 import (
diff --git a/set/set.go b/set/set.go
index 707925df..4e59f423 100644
--- a/set/set.go
+++ b/set/set.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package set
 
 import ()
diff --git a/set/set_test.go b/set/set_test.go
index 1c6a53cc..8d57cdff 100644
--- a/set/set_test.go
+++ b/set/set_test.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package set_test
 
 import (
diff --git a/xifo/deque.go b/xifo/deque.go
index fbfc2433..5f158fe2 100644
--- a/xifo/deque.go
+++ b/xifo/deque.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package xifo
 
 import ()
diff --git a/xifo/xifo_test.go b/xifo/xifo_test.go
index c413385c..48bf7fc6 100644
--- a/xifo/xifo_test.go
+++ b/xifo/xifo_test.go
@@ -1,3 +1,7 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package xifo_test
 
 import (