Hits 1-3 within 3 documents
Hits 1-3 within 3 documents
Author(s): Buhr, Petra; Leibfried, Stephan; Ludwig, Monika; Voges, Wolfgang.- 1989. 28p.
Author(s): Habich, Roland.- 1985. 575-595p.
Author(s): Beland, Henry; Denecke, Peter; Friedrich, Hannes.- 1981. 195-199p.