Japan (Continued) G/R.172 THE ESTIMATION OF THE AMOUNTOF Sr*® DEPOSITION AND THE EXTERNAL INFINITE GAMMA DOSE IN JAPAN DUE TO MAN-MADE RADIOACTIVITY Korea G/R.18 REPORT CONCERNING THE REQUEST FOR INFORMATION ON NATURAL RADIATION BACKGROUND Describes counters used for monitoring radiation background and gives results (cpm) from January 1955 to June 1956. Mexico G/R.5 FIRST REPORT ON THE STUDIES OF RADIOACTIVE FALLOUT Gives full description and comparisons of sticky paper and pot methods, preliminary results May —July 1956 for total 8 activity and intended expansion of programme. G/R.42 G/R.164 FIRST STUDIES ON RADIOACTIVE FALLOUT Revised form of G/R.5. THIRD REPORT ON THE STUDIES ON RADIOACTIVE FALLOUT Presents fallout data for 13 stations in Mexico covering the period from March to October 1957. Computes approximatefigures for infinite gamma dose and Sr®*precipitation. Gives preliminary results of Sr® and Cs!3" content in milk. G/R.187 SUMMARYOF RADIOACTIVE FALLOUT DATA RECORDED IN MEXICO Netherlands G/R.59 RADIOACTIVE FALLOUT MEASUREMENTSIN THE NETHERLANDS Describes methods used for collecting samples of airborne radioactivity and of deposited fallout, and methods of measurement. Includes tables of results for 1955 and 1956; calculation of gamma doses and quantity of Sr®° computed from total activity. G/R.90 CHEMICAL STEPS INVOLVED IN THE PRODUCTION OF MUTATIONS AND CHROMOSOME ABERRATION BY X-RADIATION AND CERTAIN CHEMICALS IN DROSOPHILA A survey of comparative studies of X-ray and chemical mutagenesis in Drosophila, made in an attempt to throw light on possible intermediate chemical steps in the induction of chromosome breaks or mutations by ionizing radiation. G/R.110 FOUR REPORTS ON QUANTITATIVE DETERMINATION OF RADIOACTIVITY G/R.183 REPORT OF THE COMMITTEE OF THE ROYAL NETHERLANDS ACADEMY OF SCIENCES CONCERNING THE DANGERS WHICH MAY ARISE FROM THE DISSEMINATION OF RADIOACTIVE PRODUCTS THROUGH NUCLEAR TEST EXPLOSIONS Report on the amount of radioactivity, its world-wide spreading and its biological risk as a consequence of test explosions. G/R.184 RADIOACTIVE FALLOUT MEASUREMENTSIN THE NETHERLANDS UNTIL DECEMBER 31, 1957 G/R.184 Correction to above report. (Corr.1) 185 ShKC RE