Columbia subject headings:
Harvard subject headings:
Historians--Ireland--Biography--Congresses.
Hogan, James, 1898-1963--Congresses.
Hogan, James, 1898-1963.
Ireland--History--20th century--Biography--Congresses.
Political scientists--Ireland--Biography--Congresses.
Revolutionaries--Ireland--Biography--Congresses.
Princeton subject headings:
Historians--Ireland--Biography.
Hogan, James, 1898-1963.
Revolutionaries--Ireland--Biography.