407859 ‘Hees op Vasg [$2¢ UWFL-63 HEALTH AND SAFETY a ~ lider sy - FURTHER CONTRIBUTIONS ON GROSS BETA RADIOACTIVITY OF BIOLOGICAL AND RELATED SAMPLES AT THE ENIWETOK PROVING GROUND, 1952-1958 By Kelshaw Bonham Seattle, Washington 4oj xug Laboratory of Radiation Biology University of Washington Top December4, 1959