Author/Creator
- United States35
- United States. Congress. House16
- United States. Congress. Senate11
- United States. Congress. House. Committee on Interstate and Foreign Commerce. (1892- 1981)7
- United States. War Department7
- United States. Congress. House. Committee on Public Lands. (1805-1951)6
- United States. Congress. House. Committee on Commerce. (1819-1892)5
- United States. War Department. Topographical Bureau5
- Iowa4
- United States. Army. Corps of Engineers4
- United States. Congress. Senate. Committee on Commerce. (1825-1946)4
- United States. Department of the Treasury4
- United States. Congress. Senate. Committee on Claims. (1816-1946)3
- United States. Congress. Senate. Committee on Public Lands. (1816-1921/1947-1948)3
- United States. Department of the Interior3
- Dubuque, Iowa2
- Mercer, David Henry, 1857-19192
- Michigan Territory (1805-1837)2
- Mondell, Frank Wheeler, 1860-19392
- Sheppard, Morris, 1875-19412