00277nam a2200109Ia 4500008004100000082001500041100002000056245001900076260004000095630001800135650001400153211109s9999||||xx |||||||||||||| ||und||  a530bGUP-A  aGupta, Satish K 0aAbc of Physics  bModern PublishersaEranakulamc1972  xGENERAL STACK  vGeneralia