000			00323nam a2200145Ia 4500
008			190201s9999 xx 000 0 und d
082			_a510
082			_b322 G7
100			_a"Goyal, Dr. J.K."
245		0	_aSet Theory Number System
260			_aMeerut
260			_bPragti Prakashan
260			_c1982
300			_a200
999			_c20925 _d20925