@book{24480,
	author = {Maclure, William,},
	title = {Observations on the geology of the United States of America;},
	publisher = {Printed for the author by A. Small,},
	year = {1817.},
	address = {Philadelphia,},
	note = {Read as a memoir before the American philosophical society, and inserted in the first volume of their Transactions, new series.}
}