Thornberry, T. L. (2010). Hopewell Furnace National Historic Site: Geologic resources inventory report. Geologic Resources Division, Natural Resource Program Center ; U.S. Department of the Interior, National Park Service, Natural Resource Program Center.
Chicago Style (17th ed.) CitationThornberry, Trista L. Hopewell Furnace National Historic Site: Geologic Resources Inventory Report. Denver, Colorado : Ft. Collins, Colorado: Geologic Resources Division, Natural Resource Program Center ; U.S. Department of the Interior, National Park Service, Natural Resource Program Center, 2010.
MLA (9th ed.) CitationThornberry, Trista L. Hopewell Furnace National Historic Site: Geologic Resources Inventory Report. Geologic Resources Division, Natural Resource Program Center ; U.S. Department of the Interior, National Park Service, Natural Resource Program Center, 2010.