@book{21021,
	author = {Safwat Abdelghany Abdelmageed Gomaah and B. W. Green , },
	title = {Limnological studies of heavy organic fertilizer effect on fish ecosystem / },
	publisher = {Safwat Abdelghany Abdelmageed Gomaah , },
	year = {1997},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}