Columbia subject headings:
Harvard subject headings:
Geopolitics--United States.
Mahan, A. T. (Alfred Thayer), 1840-1914--Friends and associates.
Roosevelt, Theodore, 1858-1919--Friends and associates.
Sea-power--United States.
United States--Foreign relations--1865-1921.
Princeton subject headings:
Geopolitics--United States.
Mahan, A. T. (Alfred Thayer), 1840-1914--Friends and associates.
Roosevelt, Theodore, 1858-1919--Friends and associates.
Sea-power--United States.
United States--Foreign relations--1865-1921.