1. Antimicrobial Agents and Chemotherapy—1961;Rosenman,1962
2. Yurchenko, J. A., Hopper, M. W., and Warren, G. H., op. cit., p. 620.
3. Yurchenko, J. A., Hopper, M. W., and Warren, G. H., Antibiot. Chemotherapy, in press.
4. Isotopic Carbon;Calvin,1949