1. Allen's outline map of Ottumwa, Iowa, 1891 Maps University Of Iowa Public content 1890. Allen, C. R., active 1878-1908. 1 map Scale [1:12,000]. 1 inch = 1000 feet. C.R. Allen.
2. Competine; Bladensburg; Ormanville; Bidwell; Chillicothe; Blakesburg Maps University Of Iowa Public content 1922. Geo. A. Ogle & Co.
4. Eldon; Kirkville; Highland Center; Keb Maps University Of Iowa Public content 1922. Geo. A. Ogle & Co.
8. Map of Center Township; Map of Agency Township Maps University Of Iowa Public content 1922. Geo. A. Ogle & Co.