diff --git a/handbook/bibliography.sgml b/handbook/bibliography.sgml
index 29a16cd7c5..e3be755353 100644
--- a/handbook/bibliography.sgml
+++ b/handbook/bibliography.sgml
@@ -1,4 +1,4 @@
-<!-- $Id: bibliography.sgml,v 1.25 1997-03-19 07:59:19 obrien Exp $ -->
+<!-- $Id: bibliography.sgml,v 1.26 1997-04-06 21:53:59 wosch Exp $ -->
 <!-- The FreeBSD Documentation Project -->
 
     <chapt>
@@ -307,6 +307,14 @@
 	      edition.  Prentice-Hall, Inc., 1989.
 	      <newline>ISBN 0-13-536657-7</item>
 
+	    <item><em>The BSD family tree</em>. 1997.
+              <newline>
+	      <htmlurl url="http://www.de.freebsd.org/de/ftp/unix-stammbaum"
+	      name="http://www.de.freebsd.org/de/ftp/unix-stammbaum">
+	      or <url url="file:/usr/share/misc/bsd-family-tree"
+	      name="local"> on a FreeBSD-current machine.
+	      </item>
+
 	  </itemize>
 
       <sect>