Jackson, C. T. (1849). Geological map of Keweenaw Point, Lake Superior. [publisher not identified].
Chicago Style (17th ed.) CitationJackson, Charles T. Geological Map of Keweenaw Point, Lake Superior. [United States?]: [publisher not identified], 1849.
MLA (9th ed.) CitationJackson, Charles T. Geological Map of Keweenaw Point, Lake Superior. [publisher not identified], 1849.
Warning: These citations may not always be 100% accurate.