Kreyenfeld, Michaela, Anne Hornung, and Karolin Kubisch. “The German Generations and Gender Survey: Some Critical Reflections on the Validity of Fertility Histories”. Comparative Population Studies 38, no. 1 (January 10, 2013). Accessed April 27, 2024. https://www.comparativepopulationstudies.de/index.php/CPoS/article/view/26.