[en] Residents of Bikini Atoll were moved from their home Atoll on 31 August 1978. Since that time, they have been relocated either to Kili Island, or to Majuro and Ejit Islands at Majuro Atoll. Whole body counting and urine bioassay were performed on this population in January and May 1979, and body burdens for nuclides positively identified were determined from both techniques. Data from these measurements have been used to calculate long-term biological removal rate constants for ¹³⁷Cs and ⁶⁰Co and to relate the long-term rate constant for ¹³⁷Cs to total body mass. (author)