000 00248nam a2200121Ia 4500
100 _aKHANNA, D.R.
110 _aGULATI, M.R.
245 _aCOLLEGE PRACTICAL PHYSICS
250 _a10
260 _bR.CHAND
_c1990
300 _a535
942 _2ddc
_cBB
999 _c73955
_d73955