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
Sir Arthur Bryant, Alan Brooke Alanbrooke (Viscount) (1957). “The Turn of the Tide: A History of the War Years Based on the Diares of Field-Marshal Lord Alanbrooke, Chief of the Imperial General Staff”