@book{13279,
	author = {African Association for Biological Nitrogen Fixation Conference  and Karanja, Nancy.},
	title = {Challenges and imperatives for biological nitrogen fixation research and application in Africa for the 21st century :},
	publisher = {J. P. Africa,},
	year = {2002.},
	address = {Nairobi :},
	edition = {1st  ed.}
}