@book{4470,
	author = {Subrahmanyam, N. and Lal, Brij.},
	title = {A textbook of optics :},
	publisher = {S. chand & co. (pvt) ltd.,},
	year = {c1966 [Reprinted 1999].},
	address = {New Delhi :},
	edition = {1st ed.},
	note = {Includes index.}
}