Upton, William Bayly. Landforms and topographic maps ; illustrating landforms of the Continental United States / William Bayly Upton. - New York : John Wiley & Sons, 1970. - x, 134 p. : ill. col. maps. 31 cm. ISBN: 047189642X Subjects--Topical Terms: Landforms--United States--Maps. Subjects--Geographic Terms: United States--Maps, Topographic.