Rasterhoff, L., author
Samsom; ’s-Gravenhage, Vuga, 1974
Buku Teks
Vollmar, H.F.A. (Hendrik Frederik Arnold), author
W.E.J. Tjeenk Willink, 1952
Buku Teks
Kapteyn, P.J.G., author
Kluwer, 1980
Buku Teks
Kapteyn, P.J.G., author
Kluwer, 1974
Buku Teks
Kapteyn, P.J.G., author
Kluwer, 1970
Buku Teks