Geldern, I. Van, author
BIJ J. B. Wolters U. M., [date of publication not identified]
Buku Referensi
Calisch, J. M., author
Gebrs E. & M. Cohen, [date of publication not identified]
Buku Referensi
Kroes, H.W.J., author
G. B. Van Goor Zonen, 1928
Buku Referensi
Vries, Jan de, author
Het Spectrum, 1991
Buku Teks
Bruggencate, K. Ten, author
J.B. Wolters-Groningen, [Date of publication not identified]
Buku Referensi