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Hits 1-3 within 3 documents
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1973. 25p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1977. 35p.
Author(s): Stiehler, Hans-Jörg.- 1987. 95p.