00269nam a2200109Ia 4500008004100000041000800041082001500049100003000064245002400094260003400118365000700152230303s9999    xx            000 0 und d  aeng  a530.4, GAU  aGAUR (R.K.)/ GUPTA (S.L.)  aEngineering Physics  aNEW DELHIbDhanpat Rai & Sons  cRS