1. Vincent, J.M. 1977. Rhizobium: general microbiology. In A Treatise on Dinitrogen Fixation, Sec. III: Biology. (R.W.F. Hardy, W.S. Silver, eds.), Wiley, New York, pp. 277–366.
2. Long, S.R. 1984. Genetics of Rhizobium nodulation. In Plant-Microbe Interactions. (T. Kosuge, E. Nester, eds.), Macmillan, New York, pp. 256–306.
3. Dudley, M.E., T.W. Jacobs, S.R. Long. 1987. Microscopic studies of cell division induced in alfalfa roots by Rhizobium meliloti. Planta, in press.
4. Verma, D.P.S., K. Nadler. 1984. Legume-Rhizobium-symbiosis: host’s point of view. In Plant Gene Research. (D.P.S. Verma, T.H. Hohn, eds.), Springer-Verlag, New York, pp. 58–93.
5. Long, S.R., W.J. Buikema, F.M. Ausubel. 1982. Cloning of Rhizobium meliloti nodulation genes by direct complementation of nod − mutants. Nature 298: 485–488.