Hits 1-4 within 4 documents
Hits 1-4 within 4 documents
Author(s): Pinther, Arnold.- 1981. 10p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1987. 161p.
Author(s): Friedrich, Walter; Klohr, Olof; Förster, Peter.- 1971. 44p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1987. 88p.