000			00292nam a2200121Ia 4500
008			190829s9999||||xx |||||||||||||| ||und||
020			_a9780070964211
100			_aAjoy Ghatak
245		0	_aOptics
260			_bTata Mcgraw Hill Publishing _aNew Delhi _c1977
650			_aOptics
942			_cBK
999			_c10818 _d10818