German Ageing Survey (DEAS): Questionnaire of the Compact Survey 2020 - Vogel, Claudia; Wettstein, Markus; Klaus, Daniela; Spuling, Svenja; Kortmann, Lisa; Lozano Alcántara, Alberto; Engstler, Heribert; Huxhold, Oliver; Nowossadeck, Sonja; Romeu Gordo, Laura; Simonson, Julia; Tesch-Römer, Clemens (Deutsches Zentrum für Altersfragen, 2021)