Paul Eltzbacher
1922 · Very good
€50
P. Wijdenes
1932 · Very good · NL
€60
F. S. Macaulay
1922 · Fine
€135
Alb C. Kruijt
1927 · Very good · NL
€25
Friedrich Engels
1905 · Fine
€80
Augustus De Morgan
1903 · Very good
€60
René Descartes
1912 · Very good
€85
Friedrich Engels, Marx-Engels
1846 · Very good
€195
Josiah Royce
1928 · Fine
€125
Peter Kropotkin
1910 · Fine
€50
Walsh, Michael
1808 · Very good
€180
Peter Kropotkin
1886 · Very good
€60
Erwin Madelung
1935 · Fine
€40
Albertus Johannes Roijaards
1897 · Very good · NL
€80
Johann Gottlieb Fichte
1910 · Very good
€60
Eric Partridge
1923 · Very good
€90
Vladimir Il’ich Lenin, John Barber
1935 · Very good
€55
Elias Loomis
1874 · Very good
€50
George Boole
1882 · Fine
€65
Walter Crane
1911 · Very good · NL
€25
William Godwin
1811 · Very good
€170
Caleb Bingham
1806 · Fine
€180
Alfred North Whitehead, Bertrand Russell
1911 · Very good
€25
Thomas Rickman, John Henry Parker
1855 · Very good
€115
Felix Klein
1926 · Very good
€35
D. Embden
1902 · Very good · NL
€30
Emile Ferrière
1909 · Fine · NL
€115
Henry B. Maglathlin
1869 · Very good
€50
Charles Hutton
1812 · Very good
€245
Jan Frederik van Someren
1900 · Very good · NL
€60
Arthur van Schendel
1921 · Fine · NL
€35
Werner Haftmann
1935 · Very good
€35
Auguste Comte
1801 · Very good
€250
Félix Sardá y Salvany
1917 · Very good
€55
Abraham Kuyper
1892 · Very good · NL
€50
John Ayres
1696 · Very good
€1,970
Florian Cajori
1907 · Very good
€45
Carl David Tolmé Runge
1916 · Fine
€50
Gerrit Cornelis August Valewink
1918 · Fine · NL
€85
Peter Kropotkin
1931 · Very good
€60
Jan Jacob Bruins
1935 · Very good · NL
€45
Emil Zuckerkandl
1923 · Very good
€35
Nicolas Malebranche
1693 · Very good
€600
Clemens Brentano
1894 · Very good
€45
Uspenskiĭ Petr Demʹi͡anovich
1935 · Fine
€95
Georgiĭ Valentinovich Plekhanov
1899 · Very good
€145
Augustin Privat-Deschanel
1903 · Very good
€40
Nathaniel Ward
1661 · Very good
€840
Sophus Lie
1907 · Very good
€30
George Santayana
1918 · Very good
€70
Roger Eliot Fry
1931 · Very good
€30
Walther Nernst
1908 · Very good
€30
Lewis Carroll
1918 · Very good
€80
F. Matthias Alexander
1935 · Fine
€35
Ika A. Thomése
1935 · Fine · NL
€35
Galileo Galilei
1644 · Very good
€2,340
David Eugene Smith
1917 · Very good
€70
L. A. Bakhuis
1902 · Very good · NL
€45
T. E. Hulme
1935 · Very good
€25
Matthias Ehrgott
1912 · Very good
€50