Hits 1-4 within 4 documents
Hits 1-4 within 4 documents
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1983. 8p.
Author(s): Gerth, Werner; Fischer, Evelyne.- 1984. 26p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1987. 13p.
Author(s): Förster, Peter.- 1988. 16p.