00245nam a2200097Ia 4500008004100000041000800041100001500049245003800064260003700102300000800139211209s1966    xx            000 0 und d  aeng  aTHERAJA BL  aTEXT BOOK OF ENGINEERING PHYSICS   aNEW DELHIbNIRAJ PRAKASHANc1966  a819