F. Matthias Alexander
1935 · Fine
€35
Sachs, Julius
1902 · Fine
€80
E. T. Whittaker, G. N. Watson
1920 · Fine
€75
Ika A. Thomése
1935 · Fine · NL
€35
George Fownes
1873 · Fine
€60
Henry Paul Talbot
1932 · Fine
€55
Arthur van Schendel
1921 · Fine · NL
€35
Klaas Johan Pen
1935 · Fine · NL
€35
Ernst H. F. Meyer
1864 · Fine
€75
John Uri Lloyd
1887 · Fine
€175
F. Max Müller
1889 · Fine
€115
David Ames Wells, George Bliss
1855 · Fine
€85
John Ruskin
1872 · Fine
€125
Thompson, D'Arcy Wentworth
1931 · Fine
€35
William Beebe
1935 · Fine
€115
Eduard Strasburger
1935 · Fine
€45
Herbert Spencer
1862 · Fine
€105
Antoni Christiaan Winand Staring
1900 · Fine · NL
€30
Abraham Kuyper
1880 · Fine · NL
€110
Carl David Tolmé Runge
1916 · Fine
€50
Frost, John
1850 · Fine
€105
Ernst Heinrich Philipp August Haeckel
1900 · Fine
€30
Wilkie Collins
1869 · Fine
€165
C. Judson Herrick
1931 · Fine
€55
Michael Gaft
1935 · Fine
€100
Erwin Madelung
1935 · Fine
€40
George Sydenham Clarke
1910 · Fine
€30
Eduard Strasburger
1924 · Fine
€40
Theodore Shennan
1912 · Fine
€45
John Ruskin
1924 · Fine
€105
Nicolass Muller
1915 · Fine · NL
€35
Guillaume Groen van Prinsterer
1903 · Fine · NL
€30
James Martineau
1923 · Fine
€40
H. Milne-Edwards
1866 · Fine · NL
€65
W. H. Hudson, W. H Hudson
1907 · Fine
€110
Emanuel Hiel
1901 · Fine · NL
€130
Arthur B. Curtis
1929 · Fine
€60
Steven S. Zumdahl
1915 · Fine
€45
August Neander
1872 · Fine
€105
Booker T. Washington
1919 · Fine
€105
Paul Drude
1919 · Fine
€160
Alfred North Whitehead
1930 · Fine
€40
Friedrich Engels
1905 · Fine
€80
Fenton John Anthony Hort
1899 · Fine
€300
John Bernhard Stallo
1883 · Fine
€55
Frederik Hendrik Neiszen
1935 · Fine · NL
€110
George Barker Stevens
1930 · Fine
€60
J. Arthur Thomson
1909 · Fine
€45
Calvin Cutter
1871 · Fine
€80
H. N. Kiliaan
1924 · Fine · NL
€110
Diana Clifford Kimber
1903 · Fine
€155
J. J. Fahie
1910 · Fine
€80
Charles David Hodgman
1916 · Fine
€45
Camille Flammarion
1887 · Fine
€80
Wood, Robert Williams
1919 · Fine
€40
Luther Holden
1865 · Fine
€130
L. A. Waterbury
1913 · Fine
€45
George M. Gould
1900 · Fine
€35
Joseph Dalton Hooker
1859 · Fine
€65
Louis Couperus
1895 · Fine · NL
€65