Hugo D. Froehlich, Bonnie E. Snow
1928 · Very good
€25
Charles Riborg Mann
1916 · Very good
€35
Eskelhoff Carsjen Gravemeijer
1902 · Good · NL
€30
T. J. Bezemer
1903 · Good · NL
€25
Otto Jespersen, Otto Jespersen
1904 · Good
€95
Paul Klee
1935 · Very good
€25
W. G. Collingwood
1924 · Fine
€80
Lewis Foreman Day
1920 · Fine
€70
Franz Sales Meyer
1934 · Very good
€40
John Dewey
1901 · Good
€45
T. Sundara Rao
1905 · Fair
€15
Chancellor, William Estabrook
1908 · Good
€70
Carl David Tolmé Runge
1916 · Fine
€50
Hilde Hacquebord
1911 · Good · NL
€40
John A. Van de Walle
1920 · Good
€35
Felix Klein
1926 · Very good
€35
Charles Fort
1933 · Fair
€35
W. M. Flinders Petrie
1916 · Good
€30
Augustus De Morgan
1903 · Very good
€60
Steven S. Zumdahl
1907 · Very good
€25
Jacob Burckhardt
1935 · Very good
€80
Frederick Orpen Bower, Sydney Howard Vines
1903 · Fair
€45
Augustin Privat-Deschanel
1903 · Very good
€40
L. H. Bailey
1932 · Good
€20
Karl Rahner
1915 · Very good
€65
Arthur W. Dow, Joseph Masheck
1918 · Very good
€45
John Ruskin
1900 · Very good
€25
Beatrix Potter, H.Y. Xiao PhD
1909 · Fair
€50
John Henry Newman
1900 · Good
€50
Lascelles Abercrombie
1915 · Fair
€25
Uspenskiĭ Petr Demʹi͡anovich
1935 · Fine
€95
Stedelijk Museum te Gouda.
1908 · Good · NL
€85
Steven S. Zumdahl
1915 · Fine
€45
Abraham Flexner
1920 · Very good
€30
E. T. Whittaker, Sir William McCrae
1906 · Good
€35
Klikspaan
1935 · Fair · NL
€35
William Archer
1925 · Fair
€55
Paul Carus
1905 · Very good
€70
George A. Cornish
1923 · Very good
€35
Robert K. Gable, Marian B. Wolf
1926 · Good
€40
John Ruskin
1914 · Good
€40
Friedrich Fröbel
1913 · Good
€20
John Henry Newman
1919 · Good
€70
Sedgwick, Adam
1915 · Very good
€95
W. W. Rouse Ball
1901 · Fair
€30
A. S. Neill
1935 · Very good
€45
Thomas Jefferson
1915 · Fair
€20
Erin C. Amerman
1935 · Good
€30
Nathan Altshiller-Court
1926 · Fair
€35
Louis Henry Jordan
1922 · Good
€20
Frans Verschoren
1913 · Good · NL
€20
Balfour Stewart
1919 · Good
€20
Guy de Maupassant
1911 · Good
€20
John Edwin Sandys, Sir
1932 · Very good
€25
Arthur Schopenhauer
1902 · Fair
€20
Ware, William R.
1935 · Fair
€15
Harry Angus Alexander Kennedy
1915 · Fair
€20
Guus Extra, Roeland van Hout
1917 · Very good · NL
€65
W. U. Hensel
1914 · Good
€20