Hits 1-4 within 4 documents
Hits 1-4 within 4 documents
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1968. 134p.
Author(s): Bacher, Johann.- 1999. 38p.
Author(s): Joly, Philippe.- 2018. 31p.
Author(s): Oberle, Monika; Hahn-Laudenberg, Katrin; Ditges, Pascal; Stamer, Märthe-Maria; Sauermann, Pia; Weigelt, Ina.- 2023. 73p.