Fundamental aspects of radiosensitivity: Report of Symposium held June 5–7, 1961, Brookhaven National Laboratory, Biology Department, Upton, New York. BNL 675 (C-31) Biology and Medicine, TID 4500, 16th edition. Price $3.00, 286 pages, many illustrations and graphs, index, table of contents, list of participants. Available from the Office of Technical Services, Department of Commerce, Washington 25, D.C., November, 1961.