150 RESPONSES OF CELLS ON THE BIOLOGICAL LEVEL 



Roller, P. C, 1947: Symp. Soc. Exp. Biol., I, 270 (Cambridge Univ. 



Press London). 

 Roller, P. C, 1947: Brit. J. Cancer, 1, 38. 

 Needham, J., 1942: Biochemistry and Morphogenesis (Cambridge Univ. 



Press, London). 

 OsTERGREN, G. and Lev AN, A., ig^^: Hereditas, 29, 496. 

 OsTERGREN, G., 1944: HcTcditas, 30, 429. 

 Revell, S. and Loveless, A., ig^g: Nature, 164, 938. 

 RoTHEN, A. 1946: J. Biol. Chem., 163, 345. 

 RoTHEN, A. 1947: jf. Biol. Chem., 167, 299. 

 Takamatsu, H., 1939: Trans. Soc. Path. Japan, 29, 492. 

 Woods, D. D. and Nimmo-Smith, R. H., 1949: Symp. Soc. Exp. Biol. 



Ill, 177. 



