Hits 1-2 within 2 documents
Hits 1-2 within 2 documents
Author(s): Bechtle, Günter; Böhle, Fritz; Düll, Klaus; Lutz, Burkart; Nuber, Christoph; Sauer, Dieter; Sengenberger, Werner.- 1972. 101p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1972. 22p.