Identical Letters Sent To: ior. HW. J. Bair Manager, Biomedical and Envfronmental Research Program Pacific Northwest Laboratory iP. 0. Box 999 fienians. Washington 99352 Pr. Roy Thompson Biology Department Pacific Northwest Laboratory . O. Box 999 ichland, Washington 99352 Dr. Roger NcClellan frector, Inhalation Toxicology Research Institute Lovelace Foundation for Medical Education and Research - 0. Box 5890 ee New Mexico 87115 r. Jack Healy fleatth Division os Alamos Scientific Laboratory - O. Box 1663 os Alamos, New Nexico 87545 r. John Harley Director, Health and Safety Laboratory . U.S. ERDA 376 Hudson Strect New York, New York 100174 Dr. Wiltiam Templeton Pacific Northwest Laboratory P.O. Box 999 Richland, Washington 99352 Dr. Chester Francis Oak Ridge National Laboratory P. 0. Box X Dak Ridge, Tennessee 37830