@book{497,
	author = { Verma, P. S and Agarwal, V. K.},
	title = {Cell biology, genetics, molecular biology, evolution and ecology /},
	publisher = {S. Chand and Company Limited,},
	year = {1990.},
	address = {New Delhi :},
	edition = {Twelfth edition.},
	note = {Includes index.
}
}