West, E.G., author
Airlington House, 1969
Buku Teks
Skinner, Andrew S., author
Clarendon Press, 1979
Buku Teks
[publisher not identified], [date of publication not identified]
Naskah
Berlin Volk und Wissen Volkseigener c1962
Buku Teks
[publisher not identified], [date of publication not identified]
Naskah