- ColeçãoPamphlet 20 - History of Grinnell College and town
- Série20.1 - Poweshiek County and Iowa State History
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- Documento20.1 pP872 - Poweshiek County map 1851-1961. photocopies of map.
- Item20.1 P872m - Poweshiek County map, 1851-1961.
- Documento20.1 pP875 - Poweshiek County index to register of births, 1880-1887. Prepared by Elizabeth Ernst. 41 p.
- Documento20.1 pP878 - Poweshiek Couny Skipper Project. Newsletter.
- Documento20.1 pP887 - Poweshiek County Farmers Mutual Insurance Association. List of lisses -- September 1, 1938 to September 1, 1939.