Raptschinsky, Boris, author
E.J. Brill, 1952
Buku Referensi
Penninga, P., author
G. C. T. Van Dorp, [date of publication not identified]
Buku Referensi
Barth, J. P. J., author
Landsdrukkerij, 1910
Buku Referensi
Pernis, H. D. van, author
J. B. Wolter, 1950
Buku Referensi
Drabbe, P., author
A. C. Nix & Co., 1932
Buku Referensi