bibindex(1) on Linux
The text e499300ff77e, as Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge), Debian 3.0 (Woody), Debian 2.2 (Potato), Debian 2.1 (Slink) shipped it. The page shows this text now.
create a bibliography index file for biblook(1)