000			00329nam a2200121Ia 4500
008			190428s9999||||xx |||||||||||||| ||und||
020			_a0-7231-0456-5
100			_aO'Connor, D.J. _99653
245			_aIntroduction to symbolic logic
250			_aThird
250			_b1970. viii-175
260			_bUniversity tutorial press. London, U.K.
999			_c9781 _d9781