1. Allen, J. M., and Hyncik, G. (1963). J. Histochem. Cytochem., 11, 169.
2. Acta genet;Arfors, K.E.; Beckman, L.; Lundin, L.G.,1963
3. 89. ____ -;Basel), 13;Ibid,1963
4. Armstrong, A. R., and Banting F. G. (1935). Canad. med. Ass. J., 33, 243.
5. King, E. J., and Harris, R. I. (1934). Ibid., 31, 14.