00390nam a2200157Ia 4500008004100000020001500041041001200056082001600068100002000084245005500104250000800159260003200167300000800199650001200207700001300219221030s9999    xx            000 0 und d  a0076998170  aEnglish  a105.23bSub  aN. Subrahmanyam 2aA Text Book of Soundcby N. Subrahmanyam, Brij Lal  a2nd  bVikas Pub.aNew Delhic1999  a285  aPhysics  aBrij Lal