00317nam a2200109Ia 450000500170000000800410001705000200005810000210007824500430009926000330014265000320017520251229084840.0251229s9999    xx            000 0 und d  aQC 231 .S8 1985  aSubrahmanyam, N. 0aWaves and OscillationscN Subrahmanyam  aNew Delhib Vikas pub c1985  aWaves - Problems, Exercises