Columbia subject headings:
Quigley, Martin, 1917-2011.
Spies--Ireland--Biography.
Spies--United States--Biography.
World War, 1939-1945--Secret service--Ireland.
World War, 1939-1945--Secret service--United States.
Harvard subject headings:
Spies--Ireland.
Spies--United States
World War, 1939-1945--Secret service--Ireland.
Princeton subject headings:
Neutrality--Ireland--History--20th century.
Quigley, Martin, 1917-2011.
Spies--Ireland--Biography.
Spies--United States--Biography.
World War, 1939-1945--Secret service--Ireland.
World War, 1939-1945--Secret service--United States.