@book{84172,
	author = {Gupta, S.L.; Kumar, V.; Sharma,R.C.},
	title = {Elements of Spectroscopy: Atomic, Molecular and Laser Physics covering Atomic Spectra; X-ray Spectra, Molecular Binding; Molecular Spectra and Laser Physics},
	publisher = {Pragati Prakashan},
	year = {2011},
	address = {Meerut}
}