Hits 1-4 within 4 documents
Hits 1-4 within 4 documents
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1972. 22p.
Author(s): Friedrich, Walter; Klohr, Olof; Förster, Peter.- 1971. 44p.
Author(s): Schmidt, Ulrike; Sturzebecher, Markus.- 2013. 18, 6, 9p.
Author(s): Platter, Julia.- 2008. 12p.