@book{49233,
	author = {Sohad Fouad Said Elsharnoby  and Abdo Othman Abdelhamied , },
	title = {Biochemical Studies on Production of Humic Substances and Their Application  In Organic Farming / },
	publisher = {Sohad Fouad Said Elsharnoby , },
	year = {2013},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}