Some Aspects of the Biology of Nitrogen-Fixing Organisms: Discussion Dilworth, M. J. ; Sprent, J. I. ; Corby, H. D. L. ; Becking, J. H. ; Materon, L. A. ; Drozd, J. W. Abstract Publication: Philosophical Transactions of the Royal Society of London Series B Pub Date: September 1987 Bibcode: 1987RSPTB.317..128D