Hits 1-4 within 4 documents
Hits 1-4 within 4 documents
Author(s): Lutz, Burkart; Krings, Inge.- 1971. 124p.
Author(s): Kasek, Leonhard; Neise, Ulrich.- 1977. 44p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1977. 35p.
Author(s): Hannsmann, M.-L.; Kasek, Leonhard.- 1976. 149p.