@book{20105,
	author = {SUBRAMANYA,K / LAL, B. / AVADHANULU,M.N},
	title = {A TEXTBOOK OF OPTICS},
	publisher = {S.CHAND & COMPANY PVT LTD},
	year = {1966 R.P.2019},
	note = {RBPL78614/19-20}
}