| Literature DB >> 758594 |
Abstract
Entities:
Keywords: Birth Rate; Demographic Factors; Fertility; Fertility Measurements; Population; Population Dynamics
Mesh:
Year: 1979 PMID: 758594 DOI: 10.1056/nejm197901113000223
Source DB: PubMed Journal: N Engl J Med ISSN: 0028-4793 Impact factor: 91.245