Columbia subject headings:
Historians--Canada--Biography.
Socialists--Canada--Biography.
Underhill, Frank H. (Frank Hawkins), 1889-1971.
Harvard subject headings:
Historians--Canada--Biography
Socialists--Canada--Biography.
Underhill, Frank H. (Frank Hawkins), 1889-1971.
Underhill, Frank H., 1889-1971.
Princeton subject headings:
Historians--Canada--Biography.
Socialists--Canada--Biography.
Underhill, Frank H., 1889-1971.