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       pbmtog3 - convert a portable bitmap into a Group 3 fax file
       pbmtog3 [pbmfile]
       Reads  a  portable  bitmap  as  output.  Produces a Group 3 fax file as
       input.
       The standard for Group 3 fax is defined in CCITT Recommendation T.4.
       Probably.
       g3topbm(1), pbm(5)
       Copyright (C) 1989 by Paul Haeberli <paul@manray.sgi.com>.
                                02 October 1989                     pbmtog3(1)