37 LITERATURE CITED Cole, D. W., S. P. Gessel and E. E. Held. 1961. Tension lysimeter studies of ion and moisture movement in glacial till and coral atoll soils. Proc. Soil 3ci. 30c. of Am., ° 4. 25, Dunning, G. M. (Ed.). 1957. Radioactive contamination of certain areas in the Pacific Ocean from nuclear tests. U.S. Atomic Energy Comission, Washington, D. C. Held, E. E., S. P. Gessel, L. J. Matson and R. F. Billings. Autoradiography of sectioned soil cores. In Proceedings of [IAEA] Symposium on Radioisotope Sample Measurement Techniques in Medicine and Biology, 1965. (In press) Kenady, R. Islands. Vienna, May 24-28, M. 1962. The soils of Rongelap Atoll, Marshall M.S. Thesis, University of Washington Library. Miller, Cc. F. and P. Loeb. 1958, Tonization rate and photon pulse rate of fission products from slow neutron fission of u235, ou. s. Naval Radiological Defense Laboratory report USNRDL-TR-247. Nugent, L. E., Jv. 1946. Coral reefs in the Gilbert, Marshall, and Caroline Islands. Geol. Soc. Am., Bull. 57, 8. Palmer, 1964. 1963. H. E., W. C. Hanson, B. I. Griffin, and D. M. No. Fleming. Radioactivity measurements in Alaskan Eskimos in Science 144:1620. Sachet, M. H. 1955. Pumice and other extraneous volcanic materials on coral atolls. Atoll Res. Bull., No. 37. Wiens, H. J. New Haven, Witkamp, M. 1962. Atoll environment and ecology. Conn., Yale University Press, 532 p. and M. L. Frank. 1964. First year of movement, distribution and availability of csl37 in the forest floor under tagged tulip poplars. Rad. Botany 4 (4):485~495.