Columbia subject headings:
Cowles, Anna Roosevelt, 1855-1931.
Roosevelt, Theodore, 1858-1919--Correspondence.
Harvard subject headings:
Cowles, Anna Roosevelt, 1855-1931--Correspondence.
Presidents--United States--Correspondence
Roosevelt, Theodore, 1858-1919--Correspondence.
Princeton subject headings:
Cowles, Anna Roosevelt, Mrs., 1855-1931.