1. Borst, P. (1977) in International Cell Biology 1976–1977 (Brinkley, B.R. and Porter, K.R., eds.), pp. 237–244, Rockefeller Univ. Press, New York, NY.
2. Quetier, F. and Vedel, F. (1977) Nature 268, 356–368.
3. Pring, D.R. and Levings, C.S. III. (1978) Genetics 89, 121–136.
4. Pring, D.R. and Conde, M.F. (1978) Plant Physiol. 61 (Suppl), 114.
5. Sisson, V.A., Brim, C.A. and Levings, C.S. III. (1978)(in press).