Buch, Drittes
[publisher not identified], [date of publication not identified]
Buku Teks
MacIver, Robert M., author
Oxford, 1926
Buku Teks
Heller, Hermann, 1891-1933
A.W. Sijthoff, 1934
Buku Teks
Schaper, B. W.
Van Gorcum , 1963
Buku Teks
Imboden, Max
Helbing, 1962
Buku Teks