@book{48309,
	author = {Ismail, A. M. A. I. and Mohamed, SH. A.},
	title = {Response of sweet sorghum (Sorghum bicolor l.) to mineral nitrogen and biofertilization},
	url = {http://nile.enal.sci.eg/EALE/2007/EJAR/8507/2/573.pdf}
}