Søren Kierkegaard
1863 · Fair
€45
Friedrich Fröbel
1913 · Good
€20
Max Scheler
1935 · Good
€20
Adriaan Pit
1930 · Good · NL
€25
Georg Wilhelm Friedrich Hegel
1910 · Very good
€35
Rudolf Otto
1929 · Fine
€35
Georg Simmel
1902 · Very good
€40
Inge, William Ralph
1926 · Fine
€50
John Cowper Powys
1933 · Very good
€50
Rabindranath Tagore
1935 · Good
€30
William De Witt Hyde
1935 · Very good
€25
Plato
1917 · Good
€30
A. S. Neill
1935 · Very good
€45
Auguste Comte
1867 · Fair
€50
Herbert Spencer
1867 · Good
€45
William Kingdon Clifford
1914 · Fair
€35
Three Initiates
1928 · Good
€20
Carl Gustav Jung
1915 · Very good
€25
Thomas Troward
1922 · Good
€30
Carl Gustav Jung
1925 · Very good
€30
Auguste Comte
1930 · Good
€30
Silvanus Phillips Thompson
1935 · Very good
€35
Friedrich Schiller
1935 · Fair
€20
Friedrich Hölderlin
1935 · Fair
€20
William James
1931 · Good
€40
Conrad Busken Huet
1881 · Fair · NL
€25
Abraham Kuyper
1897 · Fair · NL
€30
Anselm of Canterbury, Anselm
1928 · Fair
€35
Thorstein Veblen, Teichgraeber, Richard F., III
1932 · Good
€20
F. Pijper
1915 · Very good · NL
€40
Robert Flint
1932 · Very good
€40
R. Fletcher
1922 · Good
€20
José Ortega y Gasset
1915 · Very good
€45
Ernst Christian Achelis
1902 · Good · NL
€20
Peter Willem Hendrik Truyen
1901 · Fair · NL
€15
Morris Raphael Cohen
1935 · Fine
€35
Carl Gobée
1861 · Very good · NL
€45
Johann Joseph Most
1928 · Good
€20
Bernard Boedder
1897 · Fair
€40
Heinrich Spoerl
1935 · Fair · NL
€25
Jan van Leeuwen
1924 · Very good · NL
€30
J. van Lennep
1911 · Very good · NL
€45
Richard de Bury
1903 · Good
€50
Abraham Kuyper
1914 · Good · NL
€20
J. H. Van Zanten
1928 · Good · NL
€35
José Ortega y Gasset
1935 · Good
€45
Ernest Shurtleff Holmes
1935 · Fair
€15
J. van Lennep
1918 · Good · NL
€35
Johan Huizinga
1900 · Good · NL
€35
Jan Pieter Veth
1933 · Fair · NL
€20
Sigmund Freud
1906 · Good
€25
P. L. Verhulst
1935 · Fair · NL
€15
Sir J. J. Thomson
1907 · Good
€25
Hendrik Petrus Berlage
1935 · Good · NL
€50
Albert Einstein, G. B. Jeffery
1926 · Fair
€25
Edwin Emery Slosson
1935 · Very good
€40
Kahlil Gibran, jaime arbe
1924 · Fair
€30
Gerrit Kalff
1928 · Good · NL
€45
Rudolf Otto, Otto, Rudolf (Carl Ludwig Rudolf), 1869-1937.
1929 · Fair
€15
Abraham Kuyper
1935 · Very good · NL
€50