@book{81613,
	author = {Murugeshan, R and Sivaprasath, Kiruthiga},
	title = {Optics and spectroscopy. (8th rev.ed.)},
	publisher = {S. Chand and Comapny},
	year = {2012},
	address = {New Delhi:},
	edition = {8th. rev.ed.}
}