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Hits 1-3 within 3 documents
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1972. 56p.
Author(s): Winkler, Peter.- 1979. 450-472p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1973. 9p.