- Graves, Henry Solon, 1871-19512
- Great Britain. Parliament. House of Commons2
- Great Britain. War Office2
- Green, Jeffery A.2
- Griffin, William L.2
- Gruner, John W. (John Walter), 1890-2
- Gunner, John D.2
- H.M. Gousha Company2
- Hall, Henry2
- Harding, Samuel Bannister, 1866-19272
- Hawkins, Geo. T.2
- Hennepin, Louis, active 17th century2
- Heutmaker, J.F.2
- Hoempler, Carlos E. C2
- Homann Erben (Firm)2
- Howell, Reading, 1743-18272
- Ikola, R.J.2
- Illinois. Railroad and Warehouse Commission2
- India. Surveyor General2
- Iowa State College. Department of Civil Engineering2