Creator
- Hawley, F. K.1
- Iowa Geological Survey1
- Iowa State Conservation Commission. Biological Survey Unit1
- Iowa. Fish and Game Commission1
- Iowa. Highway Commission1
- Iowa. State Planning Board. Biological Survey1
- Iowa. State Planning Board. Biological Survey Unit1
- Iowa. State Planning Board. Committee on Health1
- Iowa. State Planning Board. Committee on Land Purchase Mortgage1
- Iowa. State Planning Board. Committee on Public Education1
- Iowa. State Planning Board. Committee on Rural, Secondary, & Adult Education1
- Iowa. State Planning Board. Committee on Soils Survey1
- Iowa. State Planning Board. Committee on Surveys, Maps, & Plans1
- Iowa. State Planning Board. Committee on Urban Land Use and Traffic Studies1
- Iowa. State Planning Board. Committee on business and industry1
- Iowa. State Planning Board. Committee on soil conservation1
- Iowa. State Planning Board. Farm Tenancy Committee1
- Iowa. State Planning Board. Transportation committee1
- Miller, J. Robert (John Robert), 1913-1
- Murray, Laurence W.1