1. Samish, Z., Etinger-Tulczynska, R., and Bick, M., Annals Microbiol., 9, 20 (1961).
2. Gascoigne, J. A., and Gascoigne, M. M., Biological Degradation of Cellulose (Butterworth and Co. Ltd., 1960).
3. Hall, C. B., Nature, 200, 1010 (1963).
4. Bell, T. A., Etchells, J. L., and Jones, I. D., U.S. Dept. Agric. ARS–72–5 (1955).