Hits 1-4 within 4 documents
Hits 1-4 within 4 documents
Author(s): Gerlach, Knut; Stephan, Gesine.- 2005. 22p.
Author(s): Jahn, Elke J.; Wagner, Thomas.- 2006. 58p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1980. 18p.
Author(s): Enke, Annelies; Pinther, Arnold.- 1974. 32p.