@book{41694,
	title = {Two biotic aspects (duckweed and insect) and the process of bioaccumulation in pond ecosystem /},
	publisher = {University of Dhaka, },
	year = {2006.},
	address = {Dhaka :},
	note = {Thesis (MS)-- Department of Zoology, University of Dhaka, 2002-2003}
}