00277nam a22000977a 4500082001800000100002000018245005600038260004900094300001200143650002400155  a530.124 SUB L  aSubrahmanyam, N  aWaves and oscillations /c	N Subrahmanyam; Brij Lal  aNew Delhi : Vikas Publishing House Pvt, 1974  a296 p.,  aVibrations analysis