000 00294nam a2200109Ia 45e0
008 181001s1970 xx 000 0 und d
100 _aMathur B.K.
245 0 _aPrinciples optics
260 _aKanpur
_bGopal Printing
_c1970
300 _a826
942 _2ddc
_cBK
999 _c1668
_d1668