00328nam a2200109Ia 4500008004100000082001300041100002100054245006700075260004500142300002100187650001000208171129s9999||||xx |||||||||||||| ||und||  a160bCOH  aCohen, Morris R. 0aIntroduction to logic scientific methodc/ by  Morris R. Cohen  aLodon :bRoutledge and Kegan Paul,c1934  axiv,467p.; 22cm.  aLogic