@book{2974,
	author = {African Association for Biological Nitrogen Fixation. and Mulongoy, K.},
	title = {Biological nitrogen fixation and sustainability of tropical agriculture :},
	publisher = {J. Wiley,},
	year = {c1992.},
	address = {Chichester, West Sussex, U.K. ;},
	url = {http://www.loc.gov/catdir/description/wiley036/92243318.html}
}