(en) The Aviation History Online Museum : Alcock and Brown en 1919.
google.fr
books.google.fr
(en) William Hughes, « Rivers », dans The Geography of British History: A Geographical Description of the British Islands at Successive Periods from the Earliest Times to the Present Day: with a Sketch of the Commencement of Colonisation on the Part of the English Nation, Longman, Green, Longman, Roberts, & Green, (lire en ligne).
