1. Antibiotics Annual 1959–60;Darken,1960
2. Kirsch, E. J., Dornbush, A. C., and Backus, E. J., Ibid., pp. 205–212.
3. Redin, G. S., and McCoy, M. E., Ibid., pp. 213–219.
4. Shay, A. J., Adam, J., Martin, J. H., Hausmann, W. K., Shu, P., and Bohonos, N., Ibid., pp. 194–198.