Contents Introduction. ©... 1... ee ee et ate ye oRYaphe ewig Boat BESTOP EMEDe tee gt Preface and Acknowledgments Page III ...........-.+.-+84.8. v Chapter I. External Gamma Radiation... ........... 1 Chapter II. Gross Activity 2... 2... 2... eee 5 ........-...---2 +. 0-88 2 ae 5 B. Marine Organisms and Birds .........-.2.2..2.-. 11 C. Soilb. 2. 18 D, Water... 1 we ee 21 Chapter III]. Radiochemical Analysis. . 2... 2... 1... eu. 23 Chapter IV. Internal Contamination of Animals... ....... 33 Chapter V. Residual Activity in Pacific Ocean—Operation Troll . . . 39 Chapter VI. Return of Rongelapese ......-......2.2.. 45 . ..- . 2... 1... eee 45 B. Medical Surveillance. . 2... 0 1 ww ee ee ee 48 C. Environmental Contamination .......2.2.2...0- 48 1. External Gamma Dose Rates... ........2..04. 49 2. Strontium-90. 2. 2... ee 49 References. 2. 2. 0 1 1 ww ee ee ee ee 53 A. Land Plants A. Medical Status of Rongelapese 427792—57——-2