000 00281nam a2200109Ia 4500
008 210324s1967 xx 000 0 und d
041 _aeng
082 _a530.2
100 _aSingh , Harnam
_91575893
245 _aPractical Physics B. Sc.
260 _aBombay
_bS. Chand & Co.,
_c1967
999 _c1024458
_d1024458