00339nam 2232277 450000100060000000300230000600500090002900800410003808200110007910000160009026000530010630000230015924500250018232277StarLibrary Marc Built20180420201711 ||||| |||||||||||amh  a530.15 aB. D. Gupta bNew Delhi: Vikas Publishing House Pvt Ltd c1986 axiiii, 1238p: 22 c aMathematical Physics