Giller, K. E. Nitrogen fixation in tropical cropping systems / Ken E. Giller and Kate J. Wilson - Wallingford : CAB International, c1991 - xii, 313 p. : ill. ; 24 cm Includes bibliographical references and index ISBN: 0851986714 Source: B-14033 Nat. Bib. No.: GB 92-12679 Subjects--Topical Terms: Nitrogen--FixationCropping systems--Tropics LC Class. No.: SB111 / .G54 Dewey Class. No.: 631.840913