00254nam a2200109 a 450000500170000008200170001710000160003424500240005025000130007426000360008730000210012320251203091800.0  a531,bD, gup  aGupta, R.C.  aClassical mechanics  a11th ed.  aMeerutbPragati Prakashanc1994  aviii, 444p, 22cm