--- a/bib	Tue May 15 19:21:27 2012 +0200
+++ b/bib	Tue May 15 21:30:21 2012 +0200
@@ -142,6 +142,7 @@
 %O \s-1ISBN\s0: 978-0-8330-4513-3.
 	\f(CW\s-1 http://www.rand.org/pubs/corporate_pubs/CP537/
 
+%L MH-Book
 %A Jerry Peek
 %T MH & xmh: Email for Users & Programmers
 %D 1995
@@ -164,3 +165,33 @@
 	``should nmh be an MTA or an MUA?
 %D January 2010
 %O \f(CW\s-1 http://www.mail-archive.com/nmh-workers@nongnu.org/msg01876.html
+
+%L K&R
+%A Brian W. Kernighan
+%A Dennis M. Ritchie
+%T The C Programming Language
+%I Prentice Hall
+%D 1988
+%V Second Edition
+%O \s-1ISBN\s0: 0-13-110362-8
+
+%A Stephen R. Bourne
+%T The UNIX System
+%S International Computer Science Series
+%I Addison-Wesley
+%D 1982
+%O \s-1ISBN\s0: 0201137917
+
+%A Marc J. Rochkind
+%T Advanced UNIX Programming
+%S Software Series
+%I Prentice-Hall
+%D 1985
+%O \s-1ISBN\s0: 9780130118004
+
+%A David A. Curry
+%T UNIX Systems Programming for SVR4
+%S Nutshell Series
+%I O'Reilly
+%D 1996
+%O \s-1ISBN\s0: 1565921631