Hartenstein, Elisabeth
Leipzig Prisma Verlag [1957]
Buku Teks
Scholz, Hans, author
Rowohlt, 1955
Buku Teks
Arntzen, Helmut, author
Munster, 1984
Buku Teks
Heiss, Robert
A. Francke, 1948
Buku Teks
Horvath, Odon von, author
London Methuen Educational Ltd 1985
Buku Teks