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- Completely digitized✖[remove]10
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- Wheeler, George M. (George Montague), 1842-19055
- Bien, Julius, 1829-19091
- Chapman, Pearson1
- Davis, E. P.1
- Douglas, E. M. (Edward Morehouse), 1855-19321
- Gannett, Henry, 1846-19141
- Geographical Surveys West of the 100th Meridian (U.S.)1
- Hayden, F. V. (Ferdinand Vandeveer), 1829-18871
- Marshall, R. B. (Robert Bradford), 1867-1949.1
- Moor, D. F.1
- [Washington, D.C.] :✖[remove]10
Current results range from 1876 to 1913