23. Map of the world on Mercator's projection Maps University Of Iowa Public content 1918. Geo. A. Ogle & Co.
25. North part of Estherville, county seat of Emmet Co., Iowa Maps University Of Iowa Public content 1918. Geo. A. Ogle & Co.
26. Outline map of Emmet County, Iowa Maps University Of Iowa Public content 1918. Geo. A. Ogle & Co.
27. Plat book of Emmet County, Iowa Maps University Of Iowa Public content 1930. W.W. Hixson & Co. W.W. Hixson & Co.'s 1930 plat book of Emmet County, Iowa, containing a map of the county and township maps showing land ownership 1 atlas: 14 l.; 2... W.W. Hixson & Co.
30. Standard atlas of Emmet County, Iowa, 1918 Maps University Of Iowa Public content 1918. 1 atlas: 51 p.; 45 cm. Material in the public domain. No restrictions on use. University of Iowa. Libraries. Map Collection. Geo. A. Ogle & Co.