000 00281nam a2200121Ia 4500
008 200906s9999 xx 000 0 und d
082 _a535 G9774
100 _aGUPTA,R.C
245 0 _aELEMENTS OF:OPTICS
260 _bCHAND & CO., NEW DELHI
_c1960
300 _a23X18
942 _cBK
999 _c61262
_d61262