Correction

November 1971, page 37—The figure illustrating estimated radiation doses in Joseph Lieberman's article was credited to the Division of Criteria and Standards, Office of Radiation Programs of the Environmental Protection Agency. Lieberman tells us that the data presented there should be attributed to an interagency special‐studies group working with the Criteria and Standards division; the participating agencies were the Department of Defense, the Department of Health, Education and Welfare, the Atomic Energy Commission and the Environmental Protection Agency. Their final report is due to be issued in June.