The following scientists participated in the Project. Referee HENRY I. KOHN, Ph.D., M.D. (radiation biology) Gaiser ote Emeritus of Radiation Biology, Harvard Medical School; airnan, Bikini Atoll Rehabilitation Committee; 1203 Shattuck Aved, Berkeley CA 94709 (415-526-0141) Consultants S. J. ADELSTEIN, M.D., Ph.D. (nuclear medicine) Professor of Radiology, Harvard Medical School; Director of Joint Pro Nuclear Medicine at Beth Israel Hospital, Brigham and Won Hospital, Children's Hospital and Institute, and Dana Far Center; Vice-President, National Commission on Radiologi Protection and Measurements; 25 Shattuck St., Boston, MA (617-732-1535) . H. J. DUNSTER.B.Sc., C.B. (health physics) Formerly Director National Radiological Protection Board (United Kingdom), International Commission on Radiological Protection; Resi Thames St., St. Ebbes, Oxford, OX1 1SU, United Kingdom (011-44- 865-251-716) A. S. KUBO, Ph.D., MBA, P.E. (civil and nuclear engineering) Vice President, Technical Applications, The BDM Corp. 7 Branch Drive, McLean VA 22102 (703~848-7294) H. G. PARETZKE, M.Sc., Ph.D. (radiation risk analysis) Head, Risk Analysis Section, GSF Institut fir Strahlenschutz (I for Radiation Protection), IngolstAadter Landstrasse 1, DNeuherberg 2225 Federal Republic of Germany GE-055 (011-49-893-187-2225) F. L. PETERSON, Ph.D. (hydrology and geology) Professor of Hydrology and Chairman, Dept. of Geology and Geophysics, of Hawaii, Honolulu, HI 96822 (808-948-7897) niversity W. J. SCHULL, Ph.D. (epidemiology: fects) cancer, genetics, birth Director of Center for Demographic and Population Geneti Professor of Human Genetics, Univ. of Texas Health Scien Houston; Formerly Director of the Radiation Research Fo Hiroshima-Nagasaki, Japan. Address: Population Geneti Box 20334, Houston TX 177225 (713-792-4680) and Center at