Notkola, Veijo, Harri Siiskonen, and Riikka Shemeikka. 2017. β€œThe Causes of Changes in Fertility in Northern Namibia: Ovamboland,1927–2010, and Kavango Region,1935–1979”. Finnish Yearbook of Population Research 51 (April), 23-40. https://doi.org/10.23979/fypr.60262.