E. C. Nwogu, Ohaegbulam Emmanuel, and Osuagwu Chidimma Udo. “Assessment of the Validity of Assumption of Zero Net Migration in Estimation of Adult Mortality Using Preston Integrated Approach”. Archives of Current Research International 24, no. 4 (March 12, 2024): 1–10. Accessed September 21, 2025. https://journalacri.com/index.php/ACRI/article/view/654.