39 ACKNOWLEDGEMENTS I wish to thank the staff of the Laboratory of Radiation Ecology, whose work produced the data that made this report possible. I wish especially to thank Dr. Thomas Beasley, who Supervised all of the radiochemical analyses and who did many ‘of them himself. Dr. Allyn Seymour and Dr. Beasley were of great help in planning the collections and in interpreting the results.of the survey. I am grateful to Dr. Beasley, Rodney Eagle, Terrence Jokela, and Raymond Lusk for their part in the field collections. I appreciate the cooperation of personnel of Joint Task Force Eight and Holmes & Narver, Inc., and recognize that the field collections would not have been successfully completed without their help. We exchanged samples in the field:with Drs. John Harshbarger and Donald Squires of the Smithsonian Institution and thank them for samples of coconut crabs from Oroken Island and rats from Bikini Island. Dr. Jack Tobin, Trust Territory of the Pacific, made valuable suggestions regarding the collections and was instrumental in obtaining the services of two Bikini people to assist with the collections. William Moore, U.S. Public Health Service, accompanied us during most of the collections and pointed out areas giving the highest external radiation measurements; well water and soil samples were collected from these areas. The final guidelines for the survey were developed during a preliminary survey of Bikini Atoll in March, 1969 with Frank _Cluff and Donald Hendricks, Nevada Operations Office, and Alan Smith, U. S. Public Health Service.