@book{25080,
	author = {Vidyarthi, R. D and Pandey, P.N.},
	title = {A textbook of Zoology/by R.D.Vidyarthi and P.N. Pandey},
	publisher = {S. Chand and Co. },
	year = {1998.},
	address = {New Delhi: },
	edition = {15th. ed.}
}