000 00279nam a2200109Ia 4500
008 190428s9999||||xx |||||||||||||| ||und||
100 _aLanger, S.K.
_99545
245 3 _aAn introduction to symbolic logic
250 _aThird
250 _b1967. 367
260 _bDover. New York, U.S.A.
999 _c9673
_d9673