@book{98759,
	title = {A syudy on duckweeds as a potential nitrogen source and its effect on the growth and yield of paddy /},
	publisher = {University Of Dhaka, },
	year = {1983.},
	address = {Dhaka : },
	note = {Thesis (MS )-- Department of Soil, Water & Environment, University of Dhaka,1983.}
}