1. De Maeyer, E., and De Maeyer-Guignard, J., J. Nat. Cancer Inst., 32, 1317 (1964).
2. De Maeyer, E., and De Maeyer-Guignard, J., in Cellular Control Mechanisms and Cancer, edit. by Emmelot, P., and Mühlbock, O., 365 (Elsevier Publishing Co., Amsterdam, 1964).
3. De Maeyer-Guignard, J., and De Maeyer, E., J. Nat. Cancer Inst. (in the press).
4. Findlay, G. M., Lancet, 1070 (1928).
5. Beard, H. H., Boggess, T. S., and Von Haam, E., Amer. J. Cancer, 27, 257 (1936).