Kidane A, Bariagaber H. Patterns and Covariates of Age at First Birth In Botswana: Duration Analysis Approach. Tanzania Journal for Population studies and Development [Internet]. 2012 Dec. 31 [cited 2026 Mar. 3];19(1-2). Available from: http://tjpsd.udsm.ac.tz/index.php/tjpsd/article/view/45