Geological Survey (U.S.). (1901). Topographic maps of Iowa, Michigan, Minnesota, and Wisconsin made and for sale by U.S. Geological Survey. [publisher not identified].
Chicago Style (17th ed.) CitationGeological Survey (U.S.). Topographic Maps of Iowa, Michigan, Minnesota, and Wisconsin Made and for Sale by U.S. Geological Survey. [Washington]: [publisher not identified], 1901.
MLA (9th ed.) CitationGeological Survey (U.S.). Topographic Maps of Iowa, Michigan, Minnesota, and Wisconsin Made and for Sale by U.S. Geological Survey. [publisher not identified], 1901.
Warning: These citations may not always be 100% accurate.