00312nam a2200133Ia 4500 20260413100314.0 230516s9999||||xx |||||||||||||| ||und|| Gaur, R.K. Engineering Physics Delhi ,Dhanpat Rai 1992 1020 BB 121 121 0 0 0 0 1001 1001 2023-05-17 Patiala Madan Pub. 155.00 0 60210 2023-05-17 00:00:00 2023-05-17 BK