00351nam a22001217a 4500 519283 519283 PKP A72 V212p Ravi and Vajiram 30088 Physics: Vajiram and Ravi education services by Vajiram and Ravi New Delhi Vajiram and Ravi 125. Physics 30089 General studies 30603 0 0 ddc 0 PKP_A72_V212P 0 IIPA IIPA 2022-02-21 PKP A72 V212p 88770 2022-02-21 2022-02-21 BK