- Haydon, William4
- Hebert, L.4
- Henderson, Albert4
- Hennepin, Louis, active 17th century4
- Hopkins, Griffith Morgan, Jr.4
- Hull, Dennis N. 1948-4
- 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
- Lucas, Fielding, Jr., 1781-18544
- Luffman, J. (John), 1756-18464
- Lukens, John, 1720-17894