Hits 1-3 within 3 documents
Hits 1-3 within 3 documents
Author(s): Hanekop, Heidemarie; Klein, Stefan; Köhne, Frank; Totz, Carsten; Wittke, Volker.- 2004. 23p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1983. 39p.
Author(s): Müller, Harry.- 1980. 13p.