Paul Eltzbacher
1922 · Very good
€50
Hermann Cäsar Hannibal Schubert
1927 · Good
€65
Tobias Ballot Muller
1916 · Fair · NL
€25
Louis Couturat
1935 · Good
€70
F. S. Macaulay
1922 · Fine
€135
Justus von Liebig
1850 · Good
€80
Alb C. Kruijt
1927 · Very good · NL
€25
Friedrich Engels
1905 · Fine
€80
A. Rosengarten
1897 · Fair
€35
H. A Derksen
1905 · Fair · NL
€55
Augustus De Morgan
1903 · Very good
€60
Just Havelaar
1935 · Fair · NL
€30
Josiah Royce
1928 · Fine
€125
J. T. Crawford
1923 · Good
€25
Лев Толстой
1904 · Good
€85
Peter Kropotkin
1886 · Very good
€60
Erwin Madelung
1935 · Fine
€40
Peter Kropotkin
1903 · Fair
€15
Albertus Johannes Roijaards
1897 · Very good · NL
€80
Vreeswijk, Johannes Adrianus, jr.
1909 · Good · NL
€25
Ron Larson
1931 · Fair
€20
Johann Gottlieb Fichte
1910 · Very good
€60
Friedrich Engels
1927 · Fair
€40
Vladimir Il’ich Lenin, John Barber
1935 · Very good
€55
Elias Loomis
1874 · Very good
€50
Friedrich Engels
1907 · Good
€50
Edward Carpenter
1919 · Good
€55
Thorstein Veblen
1921 · Good
€40
Thomas Rickman, John Henry Parker
1855 · Very good
€115
José Ortega y Gasset
1934 · Good
€70
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
Jeremias Gotthelf
1860 · Good · NL
€130
Wouter Hendrik Van Seters
1935 · Good · NL
€50
Jan Frederik van Someren
1900 · Very good · NL
€60
Arthur van Schendel
1921 · Fine · NL
€35
Multatuli
1878 · Good · NL
€115
Félix Sardá y Salvany
1917 · Very good
€55
Florian Cajori
1907 · Very good
€45
Ferdinand Wolff
1859 · Good · NL
€40
Carl David Tolmé Runge
1916 · Fine
€50
Peter Kropotkin
1931 · Very good
€60
Jan Jacob Bruins
1935 · Very good · NL
€45
Emil Zuckerkandl
1923 · Very good
€35
Georgiĭ Valentinovich Plekhanov
1899 · Very good
€145
Sophus Lie
1907 · Very good
€30
Dante Alighieri
1930 · Fair
€15
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
John Ruskin
1907 · Good
€25
L. E. J. Brouwer
1909 · Good · NL
€60
Bertrand Russell
1935 · Fair
€30
David Eugene Smith
1917 · Very good
€70
Heinrich Wölfflin
1920 · Good
€40
Ward, James
1902 · Good
€20
Charles Elam
1869 · Good
€40