Friedrich Engels
1905 · Fine
€80
José Ortega y Gasset
1934 · Good
€70
Holger Mosbech
1935 · Fair · NL
€20
Paul Carus
1893 · Good
€95
Willem Adriaan van Konijnenburg
1916 · Good · NL
€20
Klikspaan
1935 · Fair · NL
€35
Amédée Guillemin
1873 · Good
€95
Plato
1932 · Good
€55
Cyriel Buysse
1926 · Fine · NL
€140
F. Max Müller
1896 · Very good
€70
Benedictus de Spinoza, Wolfgang Bartuschat
1896 · Good
€40
Thomas Aquinas
1869 · Good
€70
Mircea Eliade
1923 · Fair
€50
Johann Gottlieb Fichte
1910 · Very good
€60
Bertrand Russell
1932 · Very good
€90
Johannes Hermanus Gunning
1876 · Very good · NL
€110
Josiah Royce
1928 · Fine
€125
Louis Couperus
1904 · Good · NL
€30
Benedictus de Spinoza
1909 · Good
€30
Frederik Carel Gerretson
1927 · Good · NL
€70
Marcellus Emants
1904 · Good · NL
€20
Georgiĭ Valentinovich Plekhanov
1899 · Very good
€145
Epictetus
1920 · Good
€20
Salomon Munk, S. (Salomon) Munk
1857 · Very good
€55
Plotinus
1916 · Good
€75
Multatuli
1878 · Good · NL
€115
R. G. Collingwood
1865 · Good
€45
Benjamin Constant Martha
1869 · Good · NL
€40
L. E. J. Brouwer
1909 · Good · NL
€60
Ferdinand Domela Nieuwenhuis
1904 · Fair · NL
€45
Wilhelm Berg
1880 · Good · NL
€65
Nicolass Muller
1915 · Fine · NL
€35
John Caird
1884 · Fair
€25
John Caird
1905 · Very good
€30
Emile Ferrière
1909 · Fine · NL
€115
Jacob Moleschott
1892 · Very good · NL
€85
D. Embden
1902 · Very good · NL
€30
Plato
1859 · Good
€80
Jan Valckenier Suringar
1935 · Very good · NL
€95
Lucien Poincaré
1929 · Good
€25
Pieter Cornelis Boutens
1916 · Very good · NL
€35
Philipp Woker
1885 · Fair · NL
€100
Will Durant
1919 · Good
€50
Ernst Mach
1926 · Fair
€65
Abraham Kuyper
1919 · Fine · NL
€125
Erwin Madelung
1935 · Fine
€40
Benedictus de Spinoza
1899 · Very good
€50
Ernst Bloch
1920 · Very good
€30
Alfred Weber, Frank Thilly
1902 · Good
€20
Eduard Zeller
1881 · Very good
€140
George Edward Moore
1922 · Good
€50
A. Kuyper
1931 · Very good · NL
€55
Emanuel Hannak
1911 · Very good · NL
€25
Emanuel Hiel
1901 · Fine · NL
€130
Claude Phillips
1935 · Good
€30
Jacob Cornelissen
1894 · Fair · NL
€60
Robert Edouard Moritz
1914 · Very good
€95
Friedrich Nietzsche
1915 · Fair
€25
Frans Bastiaanse
1924 · Good · NL
€55
Henry Osborn Taylor
1917 · Good
€65