000			00317nam a2200145Ia 4500
008			220421s9999||||xx |||||||||||||| ||und||
020			_c625/-
040			_aET
100			_aGUPTA P K
245		0	_aOPERATIONS RESEARCH
260			_bSULTAN CHAND & SONS _aNEW DELHI
300			_a-
500			_a35509
942			_cBK
999			_c41524 _d41524