000 00292nam a2200109Ia 4500
008 220516s1990 xx 000 0 und d
041 _aeng
082 _a535 CHA/GEO
100 _aChakraborti,P.K
_9835193
245 _aGeometrical &physical optics
260 _aCalcutta
_bNew central book
_c1990
999 _c583995
_d583995