Columbia subject headings:
Billings, Warren K., 1893-1972.
Mooney, Thomas J., 1882-1942.
Harvard subject headings:
Billings, Warren K., 1893-1972
Mooney, Thomas J., 1882-1942.
Princeton subject headings:
Billings, Warren K., 1893-1972.
Mooney, Thomas J., 1882-1942.