1. Szybalski, W., Handbook of Biochemistry, second ed., I-35 (Chemical Rubber Co., 1970).
2. Godson, G. N., in Methods in Enzymology, 12, Part A, 503 (Academic Press, New York, 1967).
3. Summers, W., Virology, 39, 175 (1969).
4. Fairbank, jun., G., Levinthal, C., and Reeder, R. H., Biochem. Biophys. Res. Commun., 20, 393 (1965).
5. Loening, V. E., Biochem. J., 102, 251 (1967).