1. ZoBell, C. E., Marine Microbiology (Chronica Botanica, Waltham, Mass., 1946).
2. Pearson, E. A., State Water Pollution Control Board, Std. Serv. Agreement No. 12C-14, State of California (1955).
3. Greenberg, A. E., Public Health Rep., 71, 77 (1956).
4. Terry, R. D., Allan Hancock Found., Univ. Southern California (1956).
5. Carlucci, A. F., and Pramer, D., App. Microbiol., 7, 388 (1959).