Charles Jay Taylor (American, 1855-1929)
Ernst Haeckel (German, 1834-1919)
Will R. Barnes (American, ?-1939)
Udo Keppler (American, 1872 – 1956)
Henrietta Barclay Paist (American, 1870–1930)
Petrus Apianus (German, 1495 – 1552)
Richard Teschner (Austrian, 1879-1948)
Carl Becker (German, 19th Century)
Paul Eugène Mesplès (French, 1849-1921)
John Shelton Eland (American, 1872-1933)
Albert Ilg (Austrian, 1847-1896)
Emile Bernard (French, 1868-1941)
Charles Martin (French, 1884 - 1934)
Albert Hahn (Dutch, 1877 – 1918)
A. Tinbergen (Dutch, 20th Century)
Fedor Grigoryevich Solntsev (Russian, 1801 – 1892)
Flavius Vegetius Renatus (Italian, 4th century)
Louis Glackens (American, 1866-1933)
Henrique Alvim Corrêa (Brazilian, 1876-1910)
Louis Glackens (American, 1866-1933)
Robert Dudley (English, 19th Century)
Will R. Barnes (American, ?-1939)