Hits 1-4 within 4 documents
Hits 1-4 within 4 documents
Author(s): Schmidt, Helfried.- 1984. 27p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1988. 131p.
Author(s): Gerth, Werner.- 1986. 42p.
Author(s): Johne, F.; Kasek, Leonhard; Rochlitz, Manfred.- 1987. 38p.