000			00321nam a2200133Ia 4500
008			160710s1980 xx 000 0 und d
020			_a0706909941
082			_a530.15 GUP
100			_aGUPTA, B.D.
245			_aMATHEMATICAL PHYSICS
260			_aGHAZIABAD(U.P.) _bVIKAS PUB. _c1980
300			_a1238
942			_2ddc _cB
999			_c44163 _d44163