AECU-3297 (Rev. ) PROJECT SUNSHINE BULLETIN NUMBER 12* PROPERTY OF . U. S$. PUBLIC HEALTH SERVICE STRONTIUM-90 CONCENTRATION DATA FOR BIOLOGICAL MATERIALS, SOILS, WATERS AND AIR FILTERS Ee A. Marteli** August 1, 1956 (Revised January 1957) The Enrico Fermi Institute for Nuclear Studies The University of Chicago Chicago 37, Illinois # This work was supported by The Division of Biology and Medicine United States Atomic Energy Commission, under Contract AT (1115-281. 4 Present Address: Geophysics Research Directorate, Air Force Cambridge Research Center, Laurence G. Hanscom Field, Bedford, Massachusetts. iii