24 10. Donaldson, L. R. et al. ll. Dunning, G. M. (Ed.}). 1957. Radioactive Contamination of Certain Areas in the Pacific Ocean from Nuclear Tests. Supt. Documents, U. S. Govt. Printing Off. 12. Held, E. E. 1957. Land Crabs and Radioactive Fallout at Eniwetok Atoll. U. S. Atomic Energy Comm. Report UWFL-50. Off. Tech. Services, U. S. Dept. Commerce. 13. Hunter, H. F. and N. E. Ballou. 1951. Fission-Product Decay Rates. Nucleonics, Vol. 9, No. 5, C-2. 14. Kawabata, T. and E. E. Held. A Method for the Determination of Strontium-90 in Biological Materials. Applied Fisheries Lab., Univ. of Washington (Seattle). Unpublished. 15. Ketchum, B. H. and V. T. Bowen. 1956. Survey of Radioactivity in the Sea Near Bikini and Eniwetok Atolls, June 11-21, 1956. U. S. Atomic Energy Comm. Report UWFL-46. Off. Tech. Services, U. S. Dept. Commerce. 1958. Biological Factors Determining the Distribution of Radioisotopes in the Sea. Proc. 2nd Internat. Confer. Peaceful Uses Atom. Energy (Geneva), paper (UN402-O1C724), p. ll. 16. Kinsman, S. et al. (Eds. and Comps.) 1957. Radiological Health Handbook. U. S. Public Health Serv. Report PB121784. off. Tech. Services, U. S. Dept. Commerce. 17. Libby, W. F. Nat. Acad. 18. Lowman, F. G. 1958. Radionuclides in Plankton Near the Marshall Islands, 1956. U. S. Atomic Energy Comm. Report UWFL-54. Off. Tech. Services, U. S. Dept. Commerce. 19. Lowman, F. G., R. F. Palumbo, and D. J. South. 1957. The Occurrence and Distribution of Radioactive Non-Fission Products in Plants and Animals of the Pacific Proving Ground. U. S. Atomic Energy Comm. Report UWFL-51. Off. Tech. Services, U. S. Dept. Commerce. 1956. Radioactive Strontium Fallout. Sciences, Vol. 42, No. 6, pp. 365-390. Proc.