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Hits 1-3 within 3 documents
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1984. 70p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1972. 29p.
Author(s): Pfeiffer, U.; Ulbrich, H.-J..- 1975. 20p.