Rudolf Steiner
1932 · Fine
€40
Rudolf Otto
1929 · Fine
€35
Inge, William Ralph
1926 · Fine
€50
Klaas Johan Pen
1935 · Fine · NL
€35
Peter Kropotkin
1910 · Fine
€50
Frederic William Farrar
1905 · Fine
€35
Erwin Madelung
1935 · Fine
€40
Ernst Heinrich Philipp August Haeckel
1900 · Fine
€30
Abraham Kuyper
1911 · Fine · NL
€30
Nicolass Muller
1915 · Fine · NL
€35
Alfred North Whitehead
1930 · Fine
€40
David Hume
1903 · Fine
€50
Guillaume Groen van Prinsterer
1903 · Fine · NL
€30
Arthur van Schendel
1921 · Fine · NL
€35
Jan Frederik Beerens
1910 · Fine · NL
€50
Antoni Christiaan Winand Staring
1900 · Fine · NL
€30
Morris Raphael Cohen
1935 · Fine
€35
Ika A. Thomése
1935 · Fine · NL
€35
F. Matthias Alexander
1935 · Fine
€35
Maximilien Marie
1925 · Fine
€35
John Dewey
1910 · Fine
€30
Eduard Strasburger
1924 · Fine
€40
Augustine of Hippo, Philip Schaff
1933 · Fine
€30
Jean-Jacques Rousseau
1927 · Fine
€30
Leonard Anthony Springer
1915 · Fine · NL
€30
Walter E. Thirring
1906 · Fine
€40
Ivo Struyf
1909 · Fine · NL
€40
Willem Jan Maria Westerwoudt
1915 · Fine · NL
€40
Henri Poincaré
1910 · Fine
€30
Jan van Leeuwen
1935 · Fine · NL
€45
C. Snouck Hurgronje
1935 · Fine · NL
€30
Pieter Joseph Cruse
1911 · Fine · NL
€30
Carl David Tolmé Runge
1916 · Fine
€50
Willem van der Woude
1913 · Fine · NL
€40
Karl Pearson
1934 · Fine
€30
Foort Cornelis Dominicus
1925 · Fine · NL
€50
Eduard Strasburger
1935 · Fine
€45
James Martineau
1923 · Fine
€40
Bernard Henri Vos
1935 · Fine · NL
€40
Mary Greer Conklin
1923 · Fine
€40
Romain Rolland
1918 · Fine
€50
Steven S. Zumdahl
1915 · Fine
€45
Carlton C. Curtis
1907 · Fine
€50
John Willis Clark
1918 · Fine
€50
Frederick Soddy
1935 · Fine
€30
Hilaire Belloc
1929 · Fine
€35
Jesse Feiring Williams
1924 · Fine
€35
W. L. van Helten
1935 · Fine · NL
€35
Rembrandt Harmenszoon van Rijn, Holm Bevers
1900 · Fine
€50
Alfred Russel Wallace
1935 · Fine
€35
Wood, Robert Williams
1919 · Fine
€40
H. Newell Martin
1903 · Fine
€40
E. B. Jamieson
1914 · Fine
€40
George Bernard Shaw
1927 · Fine
€30
L. A. Waterbury
1913 · Fine
€45
H. Newell Martin, Ernest Gale Martin
1904 · Fine
€40
George Sydenham Clarke
1910 · Fine
€30
Arthur Conan Doyle
1935 · Fine
€30
Alexander Aaronsohn
1934 · Fine
€30
Charles David Hodgman
1916 · Fine
€45