Felix Timmermans
1900 · Good · NL
€30
British Ornithologists' Union
1868 · Good
€105
British Ornithologists' Union
1907 · Fair
€45
Hermann Schlegel
1858 · Very good · NL
€65
Elizabeth Grinnell
1905 · Fine
€85
Carolyn Wells, Oliver Herford
1909 · Very good
€85
Joel Tyler Headley, Willis Fletcher Johnson
1883 · Very good
€50
Charles Swainson
1886 · Fair
€80
Jan Valckenier Suringar
1935 · Very good · NL
€95
Arthur Cleveland Bent
1935 · Very good
€25
Spencer Fullerton Baird
1910 · Fair
€60
W. H. Hudson
1935 · Fair
€25
Frederik Paul Penard
1914 · Very good · NL
€85
W. Vrolik
1886 · Fair · NL
€55
Sanborn Tenney
1868 · Fair
€75
Neltje Blanchan
1935 · Fair
€65
Dina Albertina Felix
1935 · Good · NL
€90
Stone, Witmer
1905 · Fair
€20
Alfred Kaestner
1904 · Very good
€35
Édouard Jacques Guillaume Everts
1911 · Very good · NL
€85
Plotinus
1916 · Good
€75
Charles Wardell Stiles
1914 · Fair
€25
Eduard Daniel van Oort
1922 · Fair · NL
€80
Alexander Milton Ross
1888 · Very good
€50
William Borrer
1891 · Fine
€130
David Beveridge
1892 · Very good
€55
Frederik Carel Gerretson
1927 · Good · NL
€70
Marcellus Emants
1904 · Good · NL
€20
Emile Ferrière
1909 · Fine · NL
€115
Jones, Thomas Rymer
1879 · Very good
€95
Archibald Thorburn
1935 · Very good
€35
Johann Gottlieb Fichte
1910 · Very good
€60
Albert Verwey
1916 · Very good · NL
€55
Maurits Haantjes
1871 · Very good · NL
€80
Edward Caird
1908 · Good
€25
Charles Hamilton Smith
1850 · Very good
€60
P. Verkade
1859 · Good · NL
€45
American Ornithologists' Union.
1901 · Good
€25
W. H. Hudson
1910 · Good
€75
Chester A. Reed
1907 · Good
€70
Aristophanes
1853 · Very good
€110
William Yarrell
1855 · Very good
€120
Arabella B. Buckley
1876 · Good
€35
William Macmichael
1920 · Fair
€15
Campbell, Douglas Houghton
1911 · Fair
€25
John Ruskin
1878 · Very good
€180
Benedictus de Spinoza, Wolfgang Bartuschat
1896 · Good
€40
Louis Georges Neumann, George Fleming
1896 · Fair
€105
Eliza Lee (Cabot) Follen
1859 · Very good
€55
Pieter Johannes Veth
1899 · Good · NL
€45
Marcellus Emants
1889 · Fair · NL
€40
W. H. Hudson
1901 · Good
€25
Armand Goubaux
1899 · Very good
€140
Jacob A. Riis, K. D. Weeks
1892 · Very good
€180
Hermann Schlegel
1905 · Fair · NL
€20
Hermann Schlegel
1869 · Fair · NL
€60
Plato
1859 · Good
€80
Gene Stratton-Porter
1906 · Very good
€35
Archibald Rogers
1926 · Good
€25
Bradley M. Patten
1920 · Good
€30