Creator
- Harmon, George W., 1861-19431
- Harper & Brothers1
- Harper, Roland M. (Roland McMillan), 1878-19661
- Harris County (Tex.). Engineering Department1
- Harris, Harding1
- Harris, K.L1
- Harris, Sylvanus C1
- Harrison & Smith Company (Minneapolis)1
- Harrison & Warner.1
- Harrison, John J1
- Harrison, John, active 1784-17931
- Harrison, R. L. (Topographer)1
- Harrisson, W.1
- Hart, Charles H.1
- Harwood, T.1
- Hassing, W. H1
- Hatch & Co.1
- Hatchett, J. (John)1
- Haye, G. de la1
- Haynes, George B1