Contents Introduction. . 2... 1. ee te es Preface and Acknowledgments Page mw ................. Chapter I. External Gamma Radiation... ........2..., Chapter II]. Gross Activity A. Land Plants .. 2... 2.2... 2. ee ee ee ............ 2.20240 202 20085 B. Marine Organisms and Birds . ...........2... i C. Soils. 2... ee 18 21 Chapter III. Radiochemical Analysis... ....-....0--. 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 A. Medical Status of Rongelapese ............2. 45 B. Medical Surveillance. . 2... 2... 2 eee ee ee 48 C. Environmental Contamination .......-.....4.. 48 1. External Gamma Dose Rates... 2... .- 2.2.2.4. 49 2. Strontium-90. . 2. 2. ee ee ee 49 References. . 2... 2.2.27 ee ee hee TT ee 53 DOE ARCHIVES 427792-—57——-2