Geological Survey (U.S.) & Iowa Geological Survey. (1953). Iowa, 7.5 minute series (topographic). U.S. Geological Survey.
Chicago Style (17th ed.) CitationGeological Survey (U.S.) and Iowa Geological Survey. Iowa, 7.5 Minute Series (topographic). Reston, Va.: U.S. Geological Survey, 1953.
MLA (9th ed.) CitationGeological Survey (U.S.) and Iowa Geological Survey. Iowa, 7.5 Minute Series (topographic). U.S. Geological Survey, 1953.
Warning: These citations may not always be 100% accurate.