Patterns and Covariates of Age at First Birth In Botswana: Duration Analysis Approach. Tanzania Journal for Population studies and Development, [S. l.], v. 19, n. 1-2, 2012. DOI: 10.56279/tjpsd.v19i1-2.45. Disponível em: https://journals.blenkotechnologies.co.tz/tjpsd/article/view/45. Acesso em: 17 apr. 2026.