@book{25105,
	author = {Prasad, S.N. and Kashyap, Vasantika },
	title = {A textbook of vertebrate zoology/by S.N. Prasad and Vasantika Kashyap},
	publisher = {Wiley Eastern, },
	year = {1991.},
	address = {New Delhi:},
	edition = {13th. ed.}
}