TY - JOUR A1 - Kreyenfeld, M. A1 - Hornung, A. A1 - Kubisch, K. T1 - The German Generations and Gender Survey: Some Critical Reflections on the Validity of Fertility Histories. Comparative Population Studies Y1 - 2013 JF - Zeitschrift für Bevölkerungswissenschaft VL - 28 IS - 1 ER -