00369nam a2200157Ia 4500003000500000008004100005020000900046040000900055041001200064082002100076100001700097100001500114245005700129260000900186650001600195NDCL180829s9999||||ii |||||||||||||| ||eng||  a6737  aNDCL  aEnglish  a164 RRS216th ed  aAcharya,B.P.  aRath, R.S. 0aElements of Symbolic Logic and set theorycR.S. Rath  c1981  aMathematics