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MapButler County, Iowa : 1:100 000-scale topographic map Catalog Record Only Relief shown by contours and spot heights. "Compiled from USGS 1:24 000-scale topographic maps dated 1971-1980 ... Planimetry revised from aerial photographs taken 1983 ... Map edited 1986." Alternate title: Butler Co., Iowa. Includes location map/sheet index, index to topographic maps, location map, and meters/feet conversion table. "42092-G7-CF-100." ARP
- Contributor: Iowa Geological Survey - Geological Survey (U.S.)
- Date: 1986