1. Duvale MK, Assistant Secretary for Health and Scientific Affairs: The Chest X-Ray as a Screening Procedure for Cardiopulmonary Disease. US Department of Health, Education and Welfare, TB 44, Feb 18, 1972
2. Radiation Protection in Educational Institutions: Recommendations of the National Council on Radiation Protection and Measurements, July 1966,1966
3. Analysis of tuberculosis casefinding in Denver, Colorado, 1965-70;Swallow;Health Serv Rep,1972
4. Active pulmonary tuberculosis with negative tuberculin sensitivity;Kent;Am Rev Resp Dis,1967
5. Frequency of negative intermediate-strength tuberculin sensitivity in patients with active tuberculosis;Holden;N Engl J Med,1971