00526nam a2200181Ia 4500001000700000003000500007005001700012008004100029010001500070035002000085040001300105082000800118100003900126245007900165260002900244300002700273650004400300108731BIBL20160527182622.0750709s1960    xx            000 0 eng u  a 60007009   a(OCoLC)01437375  cFXGdOCL  a16410aHalberstadt, William Harold2Local13aAn introduction to modern logicban elementary textbook of symbolic logic.0 aNew YorkbHarperc[1960]  a221 p.billus.c22 cm. 0aLogic, Symbolic and mathematical2Local