Observations on the geology of the United States of America. - Maclure, William 1763-1840. (Ulm/Donau W. Fritsch New York Stechert-Hafner, 1962)
"Read as a memoir before the American Philosophical Society, and inserted in the 1st vol. of their Transactions, new series."
Facsimile of the original ed., 1817.
Keywords: Geology -- United States