000			00328nam a2200133Ia 4500
008			180612s9999||||xx |||||||||||||| ||und||
041			_aen
082			_a530.1 aDDC19
100			_aGUPTA,B.D
245		0	_aMathematical physics
260			_bIndia. Vikas pub House Pvt. L _ctd, IN 1980
300			_a(xiii),123
942			_cPR
999			_c39593 _d39593