Hits 1-4 within 4 documents
Hits 1-4 within 4 documents
Author(s): Gerth, Werner.- 1980. 14p.
Author(s): Weiß, Anita.- 1980. 18p.
Author(s): Friedrich, Walter; Müller, Harry; Süße, Heinz.- 1969. 518p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1987. 13p.