Columbia subject headings:
Cannon, Joseph Gurney, 1836-1926.
United States--Politics and government--1865-1869.
Harvard subject headings:
Cannon, Joseph Gurney, 1836-1926.
United States--Politics and government--1865-1933.
Princeton subject headings:
Cannon, Joseph Gurnery, 1836-1926.
United States--Politics and government--1865-.