000			00278nam a2200121Ia 4500
008			151205s9999||||xx |||||||||||||| ||und||
020			_c0
100			_aMATHUR,B.K.
245			_aPRINCIPLES OF OPTICS
260			_c1967 _bGOPAL PRINTING PRESS
650			_aOPTICS
942			_cBK
999			_c204469 _d204469