Hits 1-4 within 4 documents
Hits 1-4 within 4 documents
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1981. 5p.
Author(s): Schauer, Heinz; Zeugner, Petra.- 1987. 66p.
Author(s): Lange, Günter; Dennhardt, Rudolf; Schubarth, Wilfried.- 1989. 64p.
Author(s): Schauer, Heinz.- 1980. 33p.