000 00299nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a530 S528
100 _aSHANKARANARAYANA.S.R
245 0 _aB.Sc. PHYSICS
260 _aNEW DELHI
_bS. Chand Publishing
_c1981
300 _a22X14
942 _cBK
_2DDC
999 _c18890
_d18890