@book{66439,
	author = {Ryding, Sven-Olof. and Unesco.},
	title = {The Control of eutrophication of lakes and reservoirs /},
	publisher = {Parthenon Pub. Group,},
	year = {c1989.},
	series = {Man and the biosphere series ;},
	address = {Paris :},
	note = {Includes index.}
}