P. Wijdenes
1932 · Very good · NL
€60
Emma Goldman
1919 · Fair
€35
Henry Adams
1926 · Good
€90
Arthur Schopenhauer
1912 · Good
€30
Peter Kropotkin
1910 · Fine
€50
Abraham Roger
1935 · Good · NL
€40
Walter Crane
1911 · Very good · NL
€25
Eugen Horn
1900 · Good · NL
€50
Alfred North Whitehead, Bertrand Russell
1911 · Very good
€25
Werner Haftmann
1935 · Very good
€35
Carl Adolf Elias
1893 · Good · NL
€170
Abraham Kuyper
1892 · Very good · NL
€50
Clemens Brentano
1894 · Very good
€45
Uspenskiĭ Petr Demʹi͡anovich
1935 · Fine
€95
Augustin Privat-Deschanel
1903 · Very good
€40
George Santayana
1918 · Very good
€70
Abraham Kuyper
1910 · Good · NL
€40
L. A. Bakhuis
1902 · Very good · NL
€45
Johannes Sobotta
1919 · Good
€50
John Ruskin
1888 · Fair
€55
Ernest Albee
1906 · Good
€20
Ron Larson
1906 · Good
€45
Alexander Ziegler
1874 · Very good · NL
€165
I. A. Kapandji
1919 · Very good
€85
Garrett Putman Serviss
1913 · Good
€35
Wilmore, Albert.
1921 · Good
€35
Henri Poincaré, Nicolae Sfetcu
1919 · Very good
€100
Sextus Empiricus.
1887 · Good
€40
William Allen Whitworth
1870 · Very good
€55
C. Gegenbaur
1890 · Good
€65
Julien Wolbers
1871 · Good · NL
€115
Ernst Cassirer
1930 · Good
€30
Aulnis de Bourouill, Johan baron d'
1880 · Fair · NL
€35
Balfour Stewart
1919 · Good
€20
Carl Wernicke
1887 · Good
€85
George Boole
1856 · Good
€90
R. J. W. Rudolph
1917 · Fair · NL
€25
Abraham Kuyper
1890 · Very good · NL
€45
H. Stanley Redgrove
1911 · Fine
€170
Joseph Louis Lagrange, Thomas J. McCormack
1898 · Good
€40
Agnes Repplier
1894 · Very good
€45
James McNeill Whistler
1895 · Good
€120
Cassius Jackson Keyser
1935 · Good
€50
H. Koffyberg
1924 · Fair · NL
€20
Jacob Van Beek
1921 · Good · NL
€25
Robert Fruin
1923 · Good · NL
€30
W. W. Rouse Ball, H. S. M. Coxeter
1898 · Fair
€125
Arie Mijnlieff
1881 · Good · NL
€120
Theo van Doesburg
1922 · Fair · NL
€25
Windisch, Hans
1926 · Fine · NL
€125
Rudolf Steiner, Max Gysi
1910 · Very good
€25
Adolphe Napoléon Didron
1861 · Good
€35
Stefan Zweig
1935 · Good
€35
George Adolphus Jacob
1908 · Very good
€35
Guillaume Groen van Prinsterer
1868 · Very good · NL
€70
Henry Sidgwick
1893 · Good
€95
Parmenides.
1902 · Fair
€35
Arthur A. Noyes
1935 · Good
€20
Edouard Goursat
1933 · Very good
€30
Émile Durkheim
1915 · Very good
€25