Hits 1-5 within 5 documents
Hits 1-5 within 5 documents
Author(s): Gerth, Werner.- 1976. 55p.
Author(s): Mehlhorn, Hans-Georg.- 1975. 72p.
Author(s): Hanowski, M.; Herzog, Hans; Schulze, H..- 1975. 40p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1975. 53p.
Author(s): Starke, Kurt; Hoffmann, Achim; Schauer, Heinz; Neise, Ulrich; Ulbrich, Hans-Joachim; Kasek, Leonhard.- 1977. 148p.