The study of long-range fallout has brought many organizations into the field, in the United States and in other countries. These groups operate at widely varied levels of technical competence and frequently with varied concepts of the relative importance of separate portions of the program. A more concerted world-wide effort has been exerted since the inception of the United Nations Scientific Committee on the Effects of Atomic Radiation. The AEC has assisted this Committee by providing AEC data and in the training of laboratory personnel; standard materials for intercomparison of analytical procedures have also been provided. A complete listing of all measurements made on a world-wide basis is, of course, impossible in this report, but references to the appropriate literature are given. Part 3 of this report presents three bibliographies: 1. Supplement No. 2 to USAEC Report NYO-4753, Annotated Bibliography on Long-range Effects from Nuclear Explosions. 2. General bibliography of papers onfallout, particularly Sr°® and Cs'*’. This bibliography covers only the period since the Congressional Hearings on fallout. The report on the Congressional Hearings gave a comprehensive bibliography on the subject for papers written up to the Spring of 1957. 3. Bibliography of reports submitted by Member Nations of the United Nations Scientific Committee on the Effects of Atomic Radiation. Although a number of these reports are not generally available, this bibliography indicates the type of material presented for consideration to the Committee. Part 4, Selected Papers, contains three reports on Sr*° and Cs'*" data from the United King- dom, reproducedin full through the courtesy of the authors. One of these papers, Report AEREHP/R.2353, appears in the Journal of Nuclear Energy, June 1958. The data from the United Kingdom are in general agreement with those from the United States and Canada for the corresponding periods. No attempt has been madeto tabulate these values along with the results from the United States, but comparisons can be made by reference to the tables in Parts 1 and 2 of this report. A group of reports and speeches from the United States that are not as yet generally available has been reproduced in full. Some of these deal with the interpretation of fallout data, and others deal with more specific experimental work. These papers complete Section 4.