- Balliet & Volk2
- Bowen, Howard R. (Howard Rothmann), 1908-19892
- Greenleaf, J. (Jeremiah), 1791-1864.2
- Henn, Williams & Co.2
- Huebinger Surveying and Map Publishing Co.2
- Iowa Geological Survey.2
- Iowa. Board of Railroad Commissioners2
- Iowa. Highway Commission.2
- Iowa. State Planning Board. Business Research Committee2
- Iowa. State Planning Board. Committee on Business and Industry2
- Iowa. State Planning Board. Committee on Forests & Wasteland2
- Iowa. State Planning Board. Committee on Rural, Secondary, & Adult Education Survey2
- Iowa. State Planning Board. Transportation Committee2
- Kenyon Company (Des Moines, Iowa)2
- Nowack, W.K.2
- Sanborn (Firm)2
- Sisson, John R.2
- United States. Mississippi River Commission2
- United States. Surveyor General.2
- Advocate-Republican1