1. Holsten, R. D., Sugii, M., and Steward, F. C., Nature, 208, 850 (1965).
2. Phillips, Glyn O., Adv. Carbohydrate Chem., 16, 13 (1961).
3. Phillips, G. O., Radiat. Res., 18, 446 (1963).
4. Chopra, V. L., Microbial Gen. Bulletin, No. 23, 8 (1965).
5. Berry, R. J., Hills, P. R., and Trillwood, W., Intern. J. Radiat. Biol., 9, 559 (1965).