REFERENCES Ballou, J. E. of Plutonium." Ragan, H. A. Mice." 1958. "Effects of Age and Mode of Ingestion on Absorption Proc. Soe. Exptl. Btol. Med. 98:726-727. 1975. "Enhanced Plutonium Absorption in Iron-Deficient Proc. Soc. Exptl. Btol. Med. 150:36~-39. 192