1. Barnard, R. D.: Folic Acid in Acute Leukemia, Canad. M.A.J.,63:614, (Dec.) 1950.
2. Bennette, J. G.: Amethopterin—A Toxic Tumor Inhibitor, Brit. J. Cancer6:377, 1952.
3. Totter, J. R.: Personal communication.
4. Boyd, E. M. and Delahaye, J. K.: Neutralization of Aminopterin-Induced Leucopenia by Adenosine 5 Phosphate, J. Lab. and Clin. Med.41:931, 1953.
5. Waisman, H. A., Green, M., Cravioto-Munoz, J., Ramenchik, A., and Richmond, J. B.: Role of Aureomycin and Citrovorum Factor in “Folie Acid” Deficiencies, Proc. Soc. Exp. Biol. and Med.76:384, 1951.