Plan 9 from User Space's /usr/local/plan9/src/libavl/ 

-rw-r--r--  1 rsc  users  6857 Jun  3  2011 avl.c
-rw-r--r--  1 rsc  users   101 Mar 17  2010 mkfile

Space Glenda

Copyright © 2005 Lucent Technologies, Russ Cox, MIT.
See license for details.