Book Ronald E. Grim; Allison K. Lange; Lawrence Caldwell; et al. (2019)
America Transformed: Mapping the 19th Century. (/isis/citation/CBB615808718/) unapi

Book Herman J. Viola; N. King; Ralph E. Ehrenberg (2015)
Mapping the West with Lewis & Clark. (/isis/citation/CBB738139428/) unapi

Chapter Ehrenberg, Ralph E. (2004)
“Forming a General Geographical Idea of a Country”: Mapping Louisiana from 1803-1820. In: Charting Louisiana: Five Hundred Years of Maps (p. 123). (/isis/citation/CBB000411002/) unapi

Review Ehrenberg, Ralph E. (2002)
Review of "Representing the Republic: Mapping the United States, 1600--1900". Imago Mundi: A Review of Early Cartography. (/isis/citation/CBB000202458/) unapi

Book Ehrenberg, Ralph E. (1987)
Scholar's guide to Washington, D.C. for cartography and remote sensing imagery (maps, charts, aerial photographs, satellite images, cartographic literature, and geographic information systems). (/isis/citation/CBB000044086/) unapi

Book Schwartz, Seymour I.; Ehrenberg, Ralph E. (1980)
The mapping of America. (/isis/citation/CBB000006687/) unapi

Article Ehrenberg, Ralph E. (1979)
Mapping the nation's capital: The Surveyor's Office, 1791-1818. Quarterly Journal of the Library of Congress (pp. 279-319). (/isis/citation/CBB000008388/) unapi