1. Brian, P. W. (personal communication).
2. Phinney, Bernard O., and West, Charles A., Ann. Rev. Plant Physiol., 11, 411 (1960).
3. Phinney, Bernard O., and West, Charles A., Encycl. Plant Physiol., 14, 1185 (1961).
4. Merritt, James M., Gibberellins (Adv. in Chemistry Ser., No. 28), 1 (1961).
5. Brian, P. W., Biol. Rev., 34, 37 (1959).