should not be extrapolated to other fallout exposures and 3) the medical observations quoted are not infallible, that is, a reevaluation of medical results may result in other cancer sites, different classifications for thyroid lesions or additional thyroid lesions. The sources of information were many and varied. Discussions with persons initially involved, eg. Stan Cohn, Vic Bond, and Eugene Cronkite led to documents which have been cited in the reference section. A search for records at DOE headquarters led to the many files currently held by Tom McCraw. Mr. McCraw has acted as a repository for many Atomic Energy Commission documents. Some of these documents related directly to this study and were not easily located anywhere else. An abundance of environmental results have been published by the University of Washington's Laboratory of Radiation Ecology (also known as Applied Fisheries Laboratory). Medical information was published by Brookhaven National Laboratory's Medical Department and dietary information was published by both the Medical Department and the Safety and Environmental Protection Division. Much of the early and detailed observations about the accident were recorded in documents published by the U.S. Naval Radiological Defense Laboratory and by the naval Medical Research Institute. The conclusions of the acute exposure study were that the population mean thyroid absorbed dose at Rongelap was 21 gray (2,100 rad). It was 6.7 gray (670 rad) at Sifo and 2.8 gray (280 rad) at Utirik. The overall thyroid cancer risk was in agreement with results published for Japanese exposed at Nagasaki and Hiroshima. The major route for intake of fallout was by direct ingestion. This resulted from outdoor food preparation and consumption practices during the period fallout clouds passed over the islands. > Bm BIKINI Tm — at ~ 0, Sm ~~'Ckm ~~ —© RONGERIK RONGELAP — “mo AILINGNAE "IGURE 1. Relative location of the exposed people. —-—~— 4 UTIRIK