William Beebe
1935 · Fine
€115
R. E. Snodgrass, Roger A. Morse
1933 · Fine
€70
William Beebe
1922 · Very good
€60
British Ornithologists' Union
1907 · Fair
€45
Mabel Osgood Wright
1903 · Good
€40
Grant Allen
1935 · Good
€75
P. Abas
1902 · Good · NL
€70
Herman Gorter
1935 · Fair · NL
€25
Stone, Witmer
1905 · Fair
€20
Elizabeth Grinnell
1905 · Fine
€85
Neltje Blanchan
1935 · Fair
€65
Jacob Van Beek
1921 · Good · NL
€25
Frederick Orpen Bower, Sydney Howard Vines
1903 · Fair
€45
Ernest Thompson Seton
1923 · Fine
€85
Thornton W. Burgess, Maddie Frost
1918 · Fair
€20
George Bourne
1935 · Very good
€45
Charles Darwin
1910 · Good
€85
Sargent, Charles Sprague
1905 · Good
€20
Alpheus S. Packard
1904 · Good
€25
Abbie Farwell Brown
1904 · Very good
€35
Clive Bell
1935 · Very good
€120
Frank E. Beddard
1902 · Very good
€25
Jean-Henri Fabre
1924 · Very good
€65
Arthur Radclyffe Dugmore
1914 · Very good
€50
Luther E. Wyman
1927 · Fair
€40
Hamilton Wright Mabie
1901 · Fair
€35
John Merle Coulter
1912 · Good
€55
Archibald Thorburn
1935 · Very good
€35
Édouard Jacques Guillaume Everts
1911 · Very good · NL
€85
Frederick Orpen Bower
1935 · Good
€35
Larry L. Mai
1925 · Very good
€65
Ernest Thompson Seton
1929 · Fine
€35
Jan Valckenier Suringar
1935 · Very good · NL
€95
Herman Bakels
1927 · Good · NL
€110
Neltje Blanchan
1906 · Very good
€70
L. Frank Baum
1919 · Good
€30
Robert Smythe Hichens
1919 · Very good
€55
Leander Sylvester Keyser
1907 · Fine
€70
W. H. Hudson
1910 · Good
€75
Theun de Vries
1935 · Good · NL
€20
Catherine Parr Traill
1917 · Very good
€25
Ernest Thompson Seton
1905 · Good
€35
Junk, W., firm, publishers.
1935 · Very good · NL
€40
Nederlandse Mycologische Vereniging
1918 · Fair · NL
€15
W. H. Hudson
1933 · Very good
€85
W. J. Bean, D. L. Clarke
1921 · Very good
€50
Snyder, Harry
1925 · Good
€20
Herbert Eugene Walter, Alice Hall Walter
1920 · Good
€65
John Burroughs
1905 · Fair
€55
Eleanour Sinclair Rohde
1922 · Good
€30
Joaquin Miller
1903 · Good
€110
Alfred Newton
1935 · Good
€75
J. Haak
1928 · Very good · NL
€30
Harriet Mann Miller
1901 · Fine
€70
Annie Salomons
1935 · Good · NL
€20
Arthur van Schendel
1921 · Fine · NL
€35
Sir Robert Stawell Ball
1920 · Fair
€15
Howell, Thomas
1909 · Very good
€30
Christopher Morley
1935 · Good
€30
Spencer Fullerton Baird
1910 · Fair
€60