Birket-Smith, Kaj, author
VH. Van Ditmar NV, 1950
Buku Teks
Gropp, R.O.
Der Wissenschaften, 1958
Buku Teks
Savigny, Eike von
Karl Alber Freiburg , 1969
Buku Teks
Heiss, Robert
A. Francke, 1948
Buku Teks
Hegel, Georg Wilhelm Friedrich
Dover Publications, 1956
Buku Teks