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Hits 1-4 within 4 documents
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1986. 123p.
Author(s): Winkler, Klaus.- 1983. 53p.
Author(s): Hartung, Uwe.- 1989. 44p.
Author(s): Lange, Günter.- 1983. 77p.