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Hits 1-4 within 4 documents
Author(s): Ulrich, Gisela.- 1985. 35p.
Author(s): Spitzky, Norbert.- 1987. 31p.
Author(s): Mayntz, Renate.- 2003. 17p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1990. 69p.