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Author/Creator
- Panama Railroad Company8
- United States. Congress. House8
- United States. Congress. Senate7
- Gorgas Memorial Institute of Tropical and Preventive Medicine6
- United States. President (1913-1921 : Wilson)5
- Wilson, Woodrow, 1856-19245
- Gorgas Memorial Laboratory2
- Taft, William Howard, 1857-19302
- United States. President (1909-1913 : Taft)2
- Morgan, John Tyler, 1824-19071
- New Panama Canal Company1