Hits 1-3 within 3 documents
Hits 1-3 within 3 documents
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1989. 260p.
Author(s): Hoffmann, Achim.- 1980. 79p.
Author(s): Starke, Kurt; Schauer, Heinz; Hoffmann, Achim; Neise, Ulrich.- 1975. 23p.