00318nam a2200121 a 450000500170000000800410001704100080005808200110006610000120007724500520008926400470014130000080018820260717091405.0260717s1989 ii 000 0 eng d aeng04a530.151 aHarper,10aIntroduction to mathematical Physics /cHarper, 1aNew Delhi :bPrentic Hall of India,c1989. a301