Dunn, H. L. (1956). Health and demography. U. S. Dept. of Health, Education, and Welfare, Public Health Service, Bureau of State Services, National Office of Vital Statistics.
Lua i Stíl Chicago (17ú heag.)Dunn, Halbert Louis. Health and Demography. [Washington]: U. S. Dept. of Health, Education, and Welfare, Public Health Service, Bureau of State Services, National Office of Vital Statistics, 1956.
Lua MLA (9ú heag.)Dunn, Halbert Louis. Health and Demography. U. S. Dept. of Health, Education, and Welfare, Public Health Service, Bureau of State Services, National Office of Vital Statistics, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.