United States of America (Continued) G/R.97 Correction to the above report. (Corr.1) G/R.108 CURRENT RESEARCH FINDINGS ON RADIOACTIVE FALLOUT General survey of the fallout problem, especially Sr® distribution and uptake in the human body. G/R.109 DOSAGES FROM NATURAL RADIOACTIVITY AND COSMIC RAYS G/R.123 RADIOACTIVITY OF PEOPLE AND FOODS Potassium and cesium activities measured with whole body counters are re- ported. The amount of Cs!*” now present in the population of the United States shows no marked dependence on geographical location. G/R.124 ATMOSPHERIC RADIOACTIVITY ALONG THE 80TH MERIDIAN, 1956 Radioactivity levels at the various sites during 1956 are reported for three different collecting systems: air filters, cloth screens, and gummed films. Extremely wide variations in the gross radioactivity of fission products in the air have been noted, with the highest levels occurring in the Northern hemisphere. Preliminary results of radiochemical analyses of a few filter collections are included. G/R.125 RADIOACTIVE CONTAMINATION OF CERTAIN AREAS IN THE PACIFIC OCEAN FROM NUCLEAR TESTS Contains a summary of the data on contamination levels in some areas of the Pacific Ocean and results from medical surveys of Marshall Islands inhabitants. Data on gross beta activity, individual isotope contamination and external gamma exposure are included. G/R.130 THE NATURE OF RADIOACTIVE FALLOUT AND ITS EFFECTS ON MAN An extremely diverse and extensive collection of information and expert opinion given as public testimony before a governmental committee, and presented without further evaluation. G/R.131 RADIOACTIVE STRONTIUM FALLOUT General survey of the fallout problem, especially Sr®*® distribution and uptake in the human body. G/R.142 RADIOACTIVE FALLOUT General survey of the fallout problem, especially sr® distribution and uptake in the human body. G/R.153 THE CHICAGO SUNSHINE METHOD: ABSOLUTE ASSAY OF STRONTIUM-90 IN BIOLOGICAL MATERIALS, SOILS, WATERS, AND AIR FILTERS Contains a survey of Chicago sunshine research program on the distribution of Sr®° in the biosphere. Methods of sample treatment, counting, and evolution of date are reported. Detailed description of analytical chemical procedures is added. World Health Organization G/R.58 EFFECT OF RADIATION ON HUMAN HEREDITY -—REPORT OF A STUDY GROUP (COPENHAGEN 7-11 AUGUST 1956) Document A. Reply to a question asked by the Scientific Committee on the Effects of Atomic Radiation. Report concerning general questions and recom- mendations for future progress and research. 201