Summary & conclusions of conference on medical use of radium & radium substitutes [with list of references], by Donald R. Chadwick, Chief, Division of Radiological Health, Public Health Service, Department of Health, Education, and Welfare, [paper] for presentation at symposium on Radium Management, co-sponsored by Radiological Health Section and Conference on Radiological Health, at American Public Health Association meeting in Chicago, III., Oct. 19, 1965.]