00392nam a2200169Ia 4500003000400000005001700004008004100021020001500062040000600077041001200083082001800095100002300113245001900136260004300155300001200198650001200210OSt20250131152208.0231217s9999    xx            000 0 und d  a8122403808  c0  aEnglish  a539  NAR;1  R  aNarayana Rao, B V. 0aModern physics  c1993bNew age InternationalaNew Delhi  axx, 604  aphysics