Vincent van Gogh, Anthon Gerhard Alexander Rappard (ridder van), Anthon van Rappard (1936). “Letters to an artist: from Vincent van Gogh to Anton ridder van Rappard, 1881-1885”
John James Audubon (1835). “Ornithological Biography: Or An Account of the Habits of the Birds of the United States of America; Accompanied by Descriptions of the Objects Represented in the Work Entitled The Birds of America, and Interspersed with Delineations of American Scenery and Manners. 5 Vol. Il. Q.”, p.165
Theodore Roosevelt (1908). “The Roosevelt Policy: Speeches, Letters and State Papers, Relating to Corporate Wealth and Closely Allied Topics, of Theodore Roosevelt, President of the United States”