Hits 1-3 within 3 documents
Hits 1-3 within 3 documents
Author(s): Porst, Rolf; Ranft, Sabine; Ruoff, Bernd.- 1998. 25p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1981. 74p.
Editor(s): Institut für Demoskopie Allensbach (IfD).- 2017. 114p.