Unix Programmer's Manual, Seventh Edition
Computers - Software - Operating Systems - Unix - History. Archives at Bell Labs of the 1979 manual. Troff source and formatted Gzipped PostScript/PDF versions. ...
cm.bell-labs.com
Groff
Reference - Libraries - Library and Information Science - Technical Services - Cataloguing - Bibliographic Utilities. From the GNU Project is a version of the classic text processor, troff, which incl ...