Bohr J, Janßen A, Wackerow J. Problems of Comparability in the German Microcensus over Time and the New DDI Version 3.0. IQ [Internet]. 2007 Jan. 24 [cited 2025 Apr. 19];30(1):13. Available from: https://iassistquarterly.com/index.php/iassist/article/view/605