6. References 1.) F.W. Spiers and Janet Vaughn, “Hazards of plutonium with special reference Nature Vol. 259, 531-534 (1976). to the skeleton.” 2.) F.W. Spiers, J.R. Whitwell, and A.H. Beddoe, “Calculated dose factors for the radiosensitive radionuclides.” tissues in bone irradiated by surface deposited Phys. Med. Biol. Vol. 223, 481-494 (1978). 3*) F.W. Spiers and J.R. Whitwell, “Dosimetry of 239Pu and 226Ra in man and animals” in The Health Effects of Plutonium and Radium, ed. by Webster Jee, J.W. Press, Salt Lake City, Utah (1976).