Erwin Madelung
1935 · Fine
€40
L. A. Waterbury
1913 · Fine
€45
Carl David Tolmé Runge
1916 · Fine
€50
Karl Pearson
1934 · Fine
€30
Maximilien Marie
1925 · Fine
€35
Walter E. Thirring
1906 · Fine
€40
Henry Sinclair Hall, Samuel R. Knight
1904 · Fine
€30
G. H. Hardy, J. G. Leathem
1916 · Fine
€35
Steven S. Zumdahl
1915 · Fine
€45
E. B. Jamieson
1914 · Fine
€40
Charles David Hodgman
1916 · Fine
€45
Wood, Robert Williams
1919 · Fine
€40
F. Matthias Alexander
1935 · Fine
€35
Smithsonian Institution
1935 · Fine
€45
Henry Gray F.R.S., Henry Vandyke Carter
1915 · Fine
€50
George M. Gould
1900 · Fine
€35
Thompson, D'Arcy Wentworth
1931 · Fine
€35
Frederick Soddy
1935 · Fine
€30
Morris Raphael Cohen
1935 · Fine
€35
Mādhavakara.
1924 · Fine
€30
Theodore Shennan
1912 · Fine
€45
Ika A. Thomése
1935 · Fine · NL
€35
Austin M. Patterson
1935 · Fine
€35
Lewis Beesly, Thomas Baillie Johnston
1928 · Fine
€50
Alexis Thomson
1912 · Fine
€30
Hilaire Belloc
1929 · Fine
€35
Abraham Kuyper
1911 · Fine · NL
€30
Romain Rolland
1918 · Fine
€50
J. Arthur Thomson
1909 · Fine
€45
George Sydenham Clarke
1910 · Fine
€30
Henri Poincaré
1910 · Fine
€30
Nicolass Muller
1915 · Fine · NL
€35
John Dewey
1910 · Fine
€30
Jean-Jacques Rousseau
1927 · Fine
€30
H. Newell Martin
1903 · Fine
€40
Jesse Feiring Williams
1924 · Fine
€35
Rudolf Otto
1929 · Fine
€35
Frederic William Farrar
1905 · Fine
€35
Inge, William Ralph
1926 · Fine
€50
Antoni Christiaan Winand Staring
1900 · Fine · NL
€30
Pieter Joseph Cruse
1911 · Fine · NL
€30
Carlton C. Curtis
1907 · Fine
€50
John Willis Clark
1918 · Fine
€50
Guillaume Groen van Prinsterer
1903 · Fine · NL
€30
James Martineau
1923 · Fine
€40
George Washington Carey, Inez E. Perry
1914 · Fine
€30
Ernst Heinrich Philipp August Haeckel
1900 · Fine
€30
H. Newell Martin, Ernest Gale Martin
1904 · Fine
€40
Willem van der Woude
1913 · Fine · NL
€40
Klaas Johan Pen
1935 · Fine · NL
€35
Eduard Strasburger
1924 · Fine
€40
Maurice Henry Hewlett
1926 · Fine
€45
Ernest Thompson Seton
1929 · Fine
€35
Willem Jan Maria Westerwoudt
1915 · Fine · NL
€40
Eduard Strasburger
1935 · Fine
€45
James Law, James Law - undifferentiated
1904 · Fine
€35
Mortimer Menpes, Dorothy Menpes
1901 · Fine
€40
Peter Kropotkin
1910 · Fine
€50
Rudolf Steiner
1932 · Fine
€40
Jan Frederik Beerens
1910 · Fine · NL
€50