Nitrogen fixation : Vol. 3 : Legumes / edited by W. J. Broughton. Broughton, William (William J.) Nitrogen Fixation. Nitrogen-fixing microorganisms. QR89.7 .N55 1981 581.133 19 BRN Includes bibliographical references and indexes. Oxford : Clarendon Press ; 1983. 1983. 1981 Text v. : eng