00301nam a2200121Ia 450000500170000000800410001708200150005810000150007324500240008826000380011230000120015070000170016220260205060212.0260111s9999||||xx |||||||||||||| ||und||  a621  G237E  aGaur, R.K. 0aEngineering physics  aNew DelhibDhanpat Rai Pub.c2007  a64.20p.  aGupta, S.L./