000 00321nam a2200109Ia 45e0
008 181001s1970 xx 000 0 und d
100 _aSingh and Prakesh
245 0 _aFunmamental of optics
260 _aDelhi
_bKishore Pub.Delhi
_c1970
300 _a318
942 _2ddc
_cBK
999 _c1060
_d1060