- Horsburgh, James1
- Hotchkiss, William Otis, 1878-19541
- Hudson Company (Minneapolis, Minn.)1
- Hudson Publishing Co. (Minneapolis, Minn.)1
- Huebinger, M. (Melchior)1
- Humphreys, A. A. (Andrew Atkinson), 1810-18831
- Hunt & Eaton.1
- Hutawa, Julius1
- Hügel Freiherr von, Karl Alexander, 1795 or 1796-1870.1
- Ibañez e Ibañez de Ibero, Carlos, 1825-18911
- Illinois Commerce Commission1
- Imprimerie Grou-Radenez1
- Independent Publishing Co. (Grand Island, Neb.)1
- India. Army. Simla Army. Quartermaster-General's Office.1
- Indiana. Department of Conservation1
- Indiana. Department of Geology and Natural Resources1
- Inselin, C1
- Instituto Geogräfico Militar (Chile)1
- International Society of Soil Science1
- Iowa Publishing Co.1