Carl David Tolmé Runge
1916 · Fine
€50
Thompson, D'Arcy Wentworth
1931 · Fine
€35
F. Matthias Alexander
1935 · Fine
€35
H. Newell Martin
1903 · Fine
€40
John Dewey
1910 · Fine
€30
Erwin Madelung
1935 · Fine
€40
Ika A. Thomése
1935 · Fine · NL
€35
Karl Pearson
1934 · Fine
€30
G. H. Hardy, J. G. Leathem
1916 · Fine
€35
Henry Sinclair Hall, Samuel R. Knight
1904 · Fine
€30
Walter E. Thirring
1906 · Fine
€40
Rudolf Otto
1929 · Fine
€35
Mādhavakara.
1924 · Fine
€30
Hilaire Belloc
1929 · Fine
€35
Steven S. Zumdahl
1915 · Fine
€45
L. A. Waterbury
1913 · Fine
€45
Abraham Kuyper
1911 · Fine · NL
€30
Theodore Shennan
1912 · Fine
€45
Nicolass Muller
1915 · Fine · NL
€35
George M. Gould
1900 · Fine
€35
Wood, Robert Williams
1919 · Fine
€40
Frederick Soddy
1935 · Fine
€30
Morris Raphael Cohen
1935 · Fine
€35
H. Newell Martin, Ernest Gale Martin
1904 · Fine
€40
John Willis Clark
1918 · Fine
€50
J. Arthur Thomson
1909 · Fine
€45
George Sydenham Clarke
1910 · Fine
€30
Alexis Thomson
1912 · Fine
€30
Carlton C. Curtis
1907 · Fine
€50
E. B. Jamieson
1914 · Fine
€40
Eduard Strasburger
1924 · Fine
€40
Willem Jan Maria Westerwoudt
1915 · Fine · NL
€40
Lewis Beesly, Thomas Baillie Johnston
1928 · Fine
€50
Arthur van Schendel
1921 · Fine · NL
€35
Guillaume Groen van Prinsterer
1903 · Fine · NL
€30
Charles David Hodgman
1916 · Fine
€45
Antoni Christiaan Winand Staring
1900 · Fine · NL
€30
Jesse Feiring Williams
1924 · Fine
€35
Peter Kropotkin
1910 · Fine
€50
Alfred Russel Wallace
1935 · Fine
€35
Maurice Henry Hewlett
1926 · Fine
€45
James Martineau
1923 · Fine
€40
Mortimer Menpes, Dorothy Menpes
1901 · Fine
€40
Henry Gray F.R.S., Henry Vandyke Carter
1915 · Fine
€50
Eduard Strasburger
1935 · Fine
€45
W. L. van Helten
1935 · Fine · NL
€35
Maximilien Marie
1925 · Fine
€35
George Washington Carey, Inez E. Perry
1914 · Fine
€30
Karel Čapek
1932 · Fine
€30
Inge, William Ralph
1926 · Fine
€50
Austin M. Patterson
1935 · Fine
€35
Antonio Machado
1935 · Fine
€30
James Law, James Law - undifferentiated
1904 · Fine
€35
Ernest Thompson Seton
1929 · Fine
€35
Romain Rolland
1918 · Fine
€50
Peter Lund Simmonds, Simmonds P. L. (Peter Lund)
1923 · Fine
€50
Ernst Heinrich Philipp August Haeckel
1900 · Fine
€30
Pieter Joseph Cruse
1911 · Fine · NL
€30
Smithsonian Institution
1935 · Fine
€45
Gerard Manley Hopkins
1920 · Fine
€45