Federal Republic of Germany G/R.31 REPLIES TO THE QUESTIONS PUT BY THE UNITED NATIONS SCIENTIFIC COMMITTEE ON THE EFFECTS OF ATOMIC RADIATION 1. Levels of natural radiation background. 2. Summarizes long-term research in biology and medicine under the direction of Langendorff (genetic effects); Rajewski (effects of natural radioactivity, accumulation of nuclides in tissues); Marquardt (research on natural mutation rates and their modification by irradiations); Other Institutes (pathological and physicochemicaleffect). No details given —refers to scientific publications. Food and Agricultural Organization of the United Nations G/R.76 PRINCIPAL CALCIUM CONTRIBUTORSIN NATIONAL DIETS IN RELATION TO EFFECTS OF ATOMIC RADIATION FROM STRONTIUM 90 Gives a general idea of foods contributing to the calcium uptake of human beings in various parts of the world in relation to the different food habits of these people. Data still quite preliminary. G/R.76 (Rev.1) G/R.165 PRINCIPAL CALCIUM CONTRIBUTORSIN NATIONAL DIETS IN RELATION TO EFFECTS OF ATOMIC RADIATION FROM STRONTIUM 90 GENERAL CONSIDERATION REGARDING CALCIUM AVAILABILITY IN THE BROAD SOIL GROUPS OF THE WORLD IN RELATION TO THE UPTAKE OF RADIOSTRONTIUM Classified soil groups with low calcium level. Recommendsthe investigations of the factors influencing Sr” uptake by plants growing on such soils. France G/R.16 REPORT OF 3 PARTS The report includes three main parts: 1. Methods of measuring: the radioactivity produced by nuclear explosions and nuclear industry; natural or artificial radioactivity in living beings; the _ atmospheric radon. 2. Reports on measurements relative to: natural radioactivity of rocks; radioactivity of soil and water; natural and artificial radioactivity of air, water and soil, occupational radiation exposure. 3. Studies on genetic effects of radiations and on the descendantsof patients treated with pelvic radiotherapy. G/R.179 ATOMIC ENERGY COMMISSION. CENTRE OF NUCLEAR STUDIES AT SACLAY, GIF-SUR-YVETTE (SEINE ET OISE), FRANCE. TECHNIQUES AND RESULTS OF MEASUREMENTSOF RADIOACTIVITY IN THE ENVIRONMENT. MEASUREMENT OF ENVIRONMENTAL ACTIVITY: METHODS AND RESULTS Gives results of measurements of both natural and artificial radioactivity in the environment. G/R.179 Correction to above report. (Corr.1) G/R.180 BIOLOGICAL METHODS AVAILABLE FOR USE IN THE QUANTITATIVE DETECTION OF IONIZING RADIATION Surveys and evaluates the biological methods usable for the quantitative estimation of absorbed dose. G/R.186 DOSES RECEIVED BY THE GENITAL ORGANS OF CHILDREN DURING X-RAY EXAMINATIONS 179 reasiseaeem