1. Galston, A. W., and Dalberg, L. Y., Amer. J. Bot., 41, 373 (1954).
2. Audus, L. J., and Bakhsh, J. K., Plant Growth Regulation, 109 (Iowa State University Press, Ames, Iowa, 1961).
3. Galston, A. W., Plant Growth Regulation, 124 (Iowa State University Press, Ames, Iowa, 1961).
4. Gortner, W. A., and Kent, M. J., Nature, 181, 630 (1958).
5. Furuya, M., Galston, A. W., and Stowe, B. B., Nature, 193, 456 (1962).