UNITED STATES R. ATOMIC ENERGY COMMISSION WASHINGTON 25, D.C. Ate és 2 March 12, 1958 iN REPLY REFER TO: BM; CLD Dr. Cornelius A. Tobias Professor of Medical Physics Donner Laboratory University of California Berkeley 4, California Dear Toby: I am sorry to have been so slow in producing this chapter, and now. that it is complete I hope it will meet your criteria. It has certainly been a very educational and worthwhile effort from my own standpoint, so I am very grateful to you and John for laying the task on me. As I indicated on the phone I have not proof read the material as it was typed after I left for Los Alamos. On the other hand, I am sure it is in reasonably good shape, and 1 will forward a copy later that I will have read personally as soon as I get back to DC which will probably be around the 19th. I appreciate very much your offer to help with the references. I think they are now reasonably complete, but it would be well if possible to have someone check them for accuracy. You will note that I have indicated several of them have also been reproduced in the JCAE Hearings on Fallout. I do not know the policy of the ADVANCES IN BIOLOGICAL AND MEDICAL PHYSICS, but I do think it would be helpful to some readers to have this information. I would like also to be able to include at the conclusion of the article a statement to the effect that I appreciate very much the assistance given me in the preparation of the manuscript by Dr. Forrest Western,Assistant Director for Radiation Protection, and Hal Hollister of the Environmental Sciences Branch, both of the Division of Biology and Medicine, USAEC, who made many helpful suggestions in the preparation of the manuscript. I would appreciate knowing as soon as possible when the volume will come out. Also I would like to order several hundred reprints of the chapter if this is possible, and finally, what is your policy concerning limited distribution of advanced copies of the chapter to interested persons? Sincerely yours, Charles L. Dunham, M.D., Director Division of Biology and Medicine Enclosure Manuscript (3) aati

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