@book{42233,
	title = {Freshwater elasmobranch from the Shibsa river system, Khulna /},
	publisher = {University of Dhaka, },
	year = {1997.},
	address = {Dhaka :},
	note = {Thesis (MS )--Department of Zoology, University of Dhaka, Session : 1993-1994.}
}