ABSTRACT Parts 1 and 2 of this report present data pertinent to the monitoring of long-range fallout, particularly Sr®® and Cs'3". Values are tabulated for the fallout deposition, air concentrations, water concentrations, and the amounts in foods and human bone. In addition, results are given for some experimental investigations. The report of these results is not interpretative although certain papers that do attempt to interpret the present situation with respect to Sr® in particular are reprinted in Part 4. Part 3 presents bibliographies covering the period since the 1957 hearings before the Joint Committee on Atomic Energy concerning the nature of radioactive fallout and its effects on man. A document listof submissions to the United Nations Scientific Committee on the Effects of Atomic Radiation is given to illustrate the work done in other countries, and, finally, several papers on the subject, which have not been generally available, are reprinted in Part 4. oy ty testvabetd iii