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Queries and Theories Game
Wiff/n Proof Publisher
On-Sets - The Game of Set Theory
WFF'N PROOF The Game of Modern Logic
Layman E. Allen
Physical object, 1961 ca.
Plant a "think tank" in your environment; Instructional math Play (IMP) Kits; The L-E-T Net; One Teacher's Guide to Equations
WFF 'N PROOF
3.5 and 2 inch floppy disks
Dragon Systems, Inc.; Beepwear Paging Products, LLC; Apple Computer; Supermac Software; Gavilan Computer Corporation; Atari, Inc.; Symantec; Claris Corporation; Microsoft Corporation; Dubl-Click Software, Inc.; General Reality Company
Software, 1983 ca.-1994 ca.