1. Lucas, C. E., “Marine Biology and Oceanography”, 139 (Pergamon Press, Ltd., London, 1956).
2. Bentley, J. A., “States of Auxin in the Plant”, Encyclopedia of Plant Physiol., 14 (1958) (Springer-Verlag, Berlin) (in the press).
3. Bentley, J. A., and Housley, S., Physiol. Plant, 7, 405 (1954).
4. Vlitos, A. J., Meudt, W., and Beimler, R., Contrib. Boyce Thompson Inst., 18, 283 (1956).
5. Britton, G., Housley, S., and Bentley, J. A., J. Exp. Bot., 7, 239 (1956).