Health and demography
| Egile nagusia: | |
|---|---|
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
[Washington]
U. S. Dept. of Health, Education, and Welfare, Public Health Service, Bureau of State Services, National Office of Vital Statistics
1956.
|
| Saila: | U. S. Public Health Service. Publication
no. 502 |
| Gaiak: |