00401nam a2200121Ia 4500008004100000082001900041100001600060245011500076250001200191260003900203300002200242650001500264171129s9999||||xx |||||||||||||| ||und||  a511.32bGOY-SE  aGoyal, J.K. 0aSet theory number system and bollean algebra : for B.Sc. students of all Indian Universitiesc/ by  J.K. Goyal  a2nd ed.  aMeerut :bPragati Prakashan,c1982  aviii,200p.; 22cm.  aMathematic