000 00274nam a2200121Ia 4500
008 211209s1982 xx 000 0 und d
041 _aeng
082 _aARO
100 _aARORA, C L
245 _aB.SC. PHYSICS
260 _aNEW DELHI
_bS. CHAND & CO.
_c1982
300 _a365
999 _c23091
_d23091