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020			_c10s
040			_aMAIN
041			_aEnglish
082			_a511.3 _bBAS
100			_aBasson, A. H., O'Connor, D. J.
245			_aIntroduction to symbolic logic
250			_a3rd ed.
260			_aLondon _bUniversity tutoral press _c1968
300			_aviii,175p.
650			_aMathematics
650			_aSymbolic logic
942			_cBK
999			_c32134 _d32134