Berlin Volk und Wissen Volkseigener c1962
Buku Teks
Baelz, Erwin
Indiana University Press, 1974
Buku Teks
Rudy T. Erwin
Sinar Grafika, 2004
Buku Teks
[publisher not identified], [date of publication not identified]
Naskah
[publisher not identified], [date of publication not identified]
Naskah