Peter Kropotkin
1910 · Fine
€50
Peter Kropotkin
1895 · Fair
€35
Abraham Kuyper
1911 · Fine · NL
€30
Arthur Henderson Smith
1935 · Fair
€40
Friedrich Engels
1907 · Good
€50
Vladimir Il’ich Lenin
1920 · Fair
€15
Ferdinand Domela Nieuwenhuis
1904 · Fair · NL
€45
Walter Crane
1911 · Very good · NL
€25
Paul Eltzbacher
1922 · Very good
€50
Bertrand Russell
1935 · Fair
€30
Auguste Comte
1930 · Good
€30
Lydia Maria Child
1872 · Fair
€25
Jan Jacob Bruins
1935 · Very good · NL
€45
H. Was
1898 · Very good · NL
€50
Henry E. Roscoe
1906 · Good
€45
Abraham Kuyper
1907 · Very good · NL
€30
Abraham Kuyper
1935 · Very good · NL
€50
Abraham Kuyper
1897 · Fair · NL
€30
John Reed
1932 · Fine
€40
William C. McC Lewis
1935 · Good
€30
Samuel Schmucker Sadtler
1935 · Very good
€45
Frederick Moore Simpson
1908 · Very good
€35
J. H. Dünner
1930 · Very good · NL
€50
R. J. W. Rudolph
1917 · Fair · NL
€25
Max Scheler
1935 · Good
€20
Grant Allen
1910 · Good
€40
Theodor Reik
1929 · Very good
€40
Максим Горький
1910 · Very good
€25
F. Matthias Alexander
1935 · Fine
€35
Emanuel Hannak
1911 · Very good · NL
€25
Abraham Kuyper
1910 · Good · NL
€40
Harm Bouwman
1916 · Very good · NL
€30
Roscoe Pound
1935 · Fair
€45
Leo Polak
1930 · Very good · NL
€45
Rabindranath Tagore
1917 · Very good
€35
S. Laing
1916 · Good
€50
Peter Kropotkin
1903 · Fair
€15
T. E. Hulme
1935 · Very good
€25
Steven S. Zumdahl
1907 · Very good
€25
Miguel de Unamuno
1935 · Good
€25
Houston Stewart Chamberlain
1902 · Good
€45
Thomas Mann
1928 · Very good
€45
D. Embden
1902 · Very good · NL
€30
A. G. Honig
1921 · Very good · NL
€45
Bertrand Russell
1916 · Fair
€45
Benedetto Croce
1915 · Good
€30
Steven S. Zumdahl
1915 · Good
€45
Ernst Cassirer, Claus Rosenkranz
1935 · Good
€25
B. Bymholt
1896 · Good · NL
€45
Friedrich Fröbel
1919 · Good
€20
Friedrich Fröbel
1913 · Good
€20
H. Koffyberg
1924 · Fair · NL
€20
Paul Louis Mulder
1909 · Good · NL
€45
Simon Newcomb
1903 · Good
€45
Snyder, Harry
1925 · Good
€20
Abraham Kuyper
1927 · Fair · NL
€15
Thorstein Veblen
1921 · Good
€40
Will Durant
1919 · Good
€50
Clemens Brentano
1894 · Very good
€45
Abraham Kuyper
1928 · Very good · NL
€25