Kalff, G
Haarlem Tj Willink 1914
Buku Teks
Haaksma, Remy
E. J. Brill, 1933
Buku Teks
Fokker, Abraham Anthony, 1911-, author
Groningen, 1951
Buku Teks
Langemeijer, G.E. (Gerard Eduard), 1903-1990, author
Tjeenk Willink, 1970
Buku Teks
Barents, J. (Jan), author
De Arbeiderspers, 1949
Buku Teks