19. Fisher, H.W., and J. Yeh. 1967. Contact Inhibition in Colony Formation. 
Science. 155: 581-582. 
20. Fisher, R.A., H.G. Thornton, and W.A. MacKenzie. 1922. The Accuracy of 
the Plating Method of Estimating the Density of Bacterial Populations. 
Ann. Appl. Biology. 9: 325-359. 
21. Flamm, W.G. 1975. Genetic Basis for Human Disease. Presented at the 
open meeting on “Evaluation of Systems to Detect Mutagenic Activity of 
chemicals.” July 16-17. National Institutes of Health. Bethesda. 
22. Heidelberger, C. 1975. Chemical Carcinogenesis. In Annual Rev. Biochem. 
44: 79-121. 
23. Hitotsumachi, S., Z. Rabinowitz, and L. Sachs. 1971. Chromosomal 
Control of Reversion in Transformed Cells. Nature. 231: 511-414. 
24. Hitotsumachi, S., Z. Rabinowitz, and L. Sachs. 1972. Chromosomal 
Control of Chemical Carcinogenesis. Int. J. Cancer. 9: 305-315. 
25. Hsie, A.W., and T.T. Puck. 1971. A Morphological Transformation of 
Chinese Hamster Cells Produced by Dibutyryl Cyclic Adenosine 
Monophosphate and Testosterone. Proc. Natl. Acad. Sci. USA. 68: 
358-361. 
26. Juliano, R.L., and P. Stanley. 1975. Altered Cell Surface Glycoproteins in 
Phytohemaglutinin-Resistant Mutants of Chinese Hamster Ovary Cells. 
Biochimica et Biophysica Acta. 389: 401-406. 
27. Kao, F.T., and T.T. Puck. 1969. Genetics of Somatic Mammalian Cells. IX. 
Quantitation of Mutagenesis by Physical and Chemical Agents. J. Cellular 
Physiol. 74: 245-257. 
28. Kao, F.T., and T.T. Puck. 1974. Induction and Isolation of Auxotrophic 
Mutants in Mammalian Cells. In Methods in Cell Biology. Ed., D. Prescott. 
Vol. 3. Academic Press. New York. 23-39. 
29. Lawley, P.D. 1976. Carcinogenesis by Alkylating Agents. In Chemical 
Carcinogens. Ed., C.E. Searle. Am. Chem. Soc. Washington, D.C. 83-244. 
30. Lea, D.E. 1955. Actions of Radiations on Living Cells. 2nd Ed. Cambridge 
University Press. 
31. Legator, M.S. Personal Communication. 
98 
