Some Motif docs

Motif 2.1 Programming Manual (Vol 6A) (online)
Motif 2.1 Reference Manual (Vol 6B) (7 MB PDF)
Programmers Guide (7 MB PostScript)
Programmer's Ref., Vol 1 (5 MB PostScript)
Programmer's Ref., Vol 2 (3 MB PostScript)
Programmer's Ref., Vol 3 (1.5 MB PostScript)
Widget writer's Guide (3.5 MB PostScript)