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diff --git a/doc/graph.n b/doc/graph.n
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--- a/doc/graph.n
+++ b/doc/graph.n
@@ -1,4 +1,8 @@
'\"
+'\" Smithsonian Astrophysical Observatory, Cambridge, MA, USA
+'\" This code has been modified under the terms listed below and is made
+'\" available under the same terms.
+'\"
'\" Copyright 1991-1998 by Bell Labs Innovations for Lucent Technologies.
'\"
'\" Permission to use, copy, modify, and distribute this software and its