Lewis Foreman Day
1920 · Fine
€70
Claude Irwin Palmer
1912 · Good
€20
Friedrich Fröbel
1913 · Good
€20
Jørgen Peter Müller
1902 · Fine
€155
René Descartes
1912 · Very good
€85
A. S. Neill
1935 · Very good
€45
Maria Montessori
1931 · Good
€110
W. W. Rouse Ball
1935 · Fair
€15
R. Fletcher
1922 · Good
€20
John Dewey
1901 · Good
€45
Martin Klopstock
1911 · Good
€35
Edwin Emery Slosson
1935 · Very good
€40
Thorstein Veblen, Teichgraeber, Richard F., III
1932 · Good
€20
Gerrit Cornelis August Valewink
1918 · Fine · NL
€85
Hegeler Institute
1924 · Fine
€100
Garrett Putman Serviss
1935 · Good
€95
Burnett Hillman Streeter, R. Brook
1919 · Fair
€15
William Kingdon Clifford
1914 · Fair
€35
Silvanus Phillips Thompson
1935 · Very good
€35
Gerrit van de Linde
1909 · Fair · NL
€20
William Strunk, Jr., E. B. White
1920 · Very good
€85
Koninklijk Instituut voor de Taal-, Land- en Volkenkunde van Nederlandsch-Indië.
1915 · Good · NL
€20
Frank Hall Thorp
1906 · Good
€25
Ernest Shurtleff Holmes
1935 · Fair
€15
Bronger van Halteren
1911 · Good · NL
€65
Peter Willem Hendrik Truyen
1901 · Fair · NL
€15
Alpheus S. Packard
1904 · Good
€25
Frederick Soddy
1935 · Fine
€30
Walter E. Thirring
1906 · Fine
€40
Sir James Alfred Ewing
1932 · Good
€95
Thomas Troward
1922 · Good
€30
Arthur Clutton-Brock
1935 · Good
€20
Edgar Rice Burroughs
1935 · Good
€45
G. N. Watson
1935 · Good
€20
Judah M. Eisenberg, Walter Greiner
1904 · Good
€40
Michiel Cornelis van Mourik Broekman
1925 · Very good · NL
€95
Morris Raphael Cohen
1935 · Fine
€35
John A. Van de Walle
1920 · Good
€35
Bertrand Russell
1935 · Good
€85
Victor Horsley
1902 · Very good
€55
J. Reynolds Green
1916 · Fair
€20
Auguste Comte
1930 · Good
€30
W. Simon
1912 · Good
€70
Frederick Bogue Noyes
1935 · Very good
€45
Samuel O. L. Potter
1910 · Good
€30
W. M. Flinders Petrie, William F. Petrie
1911 · Good
€60
Earl Derr Biggers, Robert Welles Ritchie
1932 · Fine
€90
Freda Dinn
1903 · Very good
€35
Adolf Engler
1917 · Good
€25
Yogananda Paramahansa
1931 · Fine
€125
Percival Lowell
1907 · Very good
€25
Roger Eliot Fry
1931 · Very good
€30
Rudolf Otto
1929 · Fine
€35
Sir J. J. Thomson
1907 · Good
€25
Armando Palacio Valdés, Guy Everett Snavely
1919 · Good
€20
Robert Flint
1932 · Very good
€40
Walter W. Bryant
1907 · Good
€25
F. Pijper
1915 · Very good · NL
€40
Sedgwick, Adam
1915 · Very good
€95
Charles Fort
1933 · Fair
€35