Carlton C. Curtis
1907 · Fine
€50
Thompson, D'Arcy Wentworth
1931 · Fine
€35
F. Matthias Alexander
1935 · Fine
€35
John Dewey
1910 · Fine
€30
Abraham Kuyper
1911 · Fine · NL
€30
Antoni Christiaan Winand Staring
1900 · Fine · NL
€30
Arthur van Schendel
1921 · Fine · NL
€35
Hilaire Belloc
1929 · Fine
€35
George Sydenham Clarke
1910 · Fine
€30
Maurice Henry Hewlett
1926 · Fine
€45
Guillaume Groen van Prinsterer
1903 · Fine · NL
€30
Carl David Tolmé Runge
1916 · Fine
€50
Alfred Russel Wallace
1935 · Fine
€35
H. Newell Martin
1903 · Fine
€40
John Willis Clark
1918 · Fine
€50
Nicolass Muller
1915 · Fine · NL
€35
Willem Jan Maria Westerwoudt
1915 · Fine · NL
€40
H. Newell Martin, Ernest Gale Martin
1904 · Fine
€40
Ernst Heinrich Philipp August Haeckel
1900 · Fine
€30
Klaas Johan Pen
1935 · Fine · NL
€35
Frederick Soddy
1935 · Fine
€30
Mary Greer Conklin
1923 · Fine
€40
Eduard Strasburger
1935 · Fine
€45
Erwin Madelung
1935 · Fine
€40
Pieter Joseph Cruse
1911 · Fine · NL
€30
J. Arthur Thomson
1909 · Fine
€45
Theodore Shennan
1912 · Fine
€45
Alfred North Whitehead
1930 · Fine
€40
Alexis Thomson
1912 · Fine
€30
Mādhavakara.
1924 · Fine
€30
James Martineau
1923 · Fine
€40
Jesse Feiring Williams
1924 · Fine
€35
Ernest Thompson Seton
1929 · Fine
€35
Abraham Lincoln, edited by Marion Mills Miller
1917 · Fine
€45
Henry Gray F.R.S., Henry Vandyke Carter
1915 · Fine
€50
G. H. Hardy, J. G. Leathem
1916 · Fine
€35
George M. Gould
1900 · Fine
€35
Ika A. Thomése
1935 · Fine · NL
€35
Morris Raphael Cohen
1935 · Fine
€35
Hilaire Belloc, William Hyde
1904 · Fine
€40
Steven S. Zumdahl
1915 · Fine
€45
Karel Čapek
1932 · Fine
€30
Rudolf Otto
1929 · Fine
€35
Walter E. Thirring
1906 · Fine
€40
Dorothy Canfield Fisher
1931 · Fine
€35
Henry Sinclair Hall, Samuel R. Knight
1904 · Fine
€30
Leonard Anthony Springer
1915 · Fine · NL
€30
Eduard Strasburger
1924 · Fine
€40
Jan van Leeuwen
1935 · Fine · NL
€45
Maximilien Marie
1925 · Fine
€35
Peter Kropotkin
1910 · Fine
€50
Charles David Hodgman
1916 · Fine
€45
Romain Rolland
1918 · Fine
€50
L. A. Waterbury
1913 · Fine
€45
E. B. Jamieson
1914 · Fine
€40
W. L. van Helten
1935 · Fine · NL
€35
John Reed
1932 · Fine
€40
Lewis Beesly, Thomas Baillie Johnston
1928 · Fine
€50
Peter Lund Simmonds, Simmonds P. L. (Peter Lund)
1923 · Fine
€50
Rudolf Steiner
1932 · Fine
€40