00316nam a2200133Ia 4500008004100000041001200041082001600053100001500069245002400084260003700108300000900145650001200154700001600166221030s9999    xx            000 0 und d  aEnglish  a105.23bGau  aR. K. Gaur 0aEngineering Physics  bDhanpat Rai PubaNew Delhic1999  a1020  aPhysics  aS. L. Gupta