- Illinois State Geological Survey4
- Iowa Publishing Co.4
- Iowa. State Planning Board. Committee on Population & Social Trends4
- Iowa. State Planning Board. Committee on Transportation4
- Iowa. State Planning Board. Committee on Water Flow & Supply & Stream Pollution4
- J.H. Colton & Co4
- J.N. Matthews Co.4
- Janvier, Jean, 1859-19234
- Johnson & Browning4
- Johnson, A. J. (Alvin Jewett), 1827-1884.4
- Kenyon Printing & Mfg Co.4
- Leverett, Frank, 1859-19434
- Lucas, Fielding, Jr., 1781-18544
- Luffman, J. (John), 1756-18464
- Lukens, John, 1720-17894
- Lyne, James4
- Max Freissler (Firm)4
- Mayer, Harold M. (Harold Melvin), 1916-19944
- McClelland, D.4
- Mills, Ira B.4