Columbia subject headings:
Ireland--Politics and government--1922-1949.
Revolutionaries--Ireland--Biography.
Ryan, Frank, 1902-1944.
Socialism--Ireland--History--20th century.
Spain--History--Civil War, 1936-1939--Participation, Irish.
Harvard subject headings:
Ireland--Politics and government--1922-1949.
Revolutionaries--Ireland--Biography
Ryan, Frank, 1902-1944.
Spain--History--Civil War, 1936-1939--Participation, Irish.
Princeton subject headings:
Ireland--Politics and government--1922-1949.
Irish Republican Army--Biography.
Revolutionaries--Ireland--Biography.
Ryan, Frank, 1902-1944.
Socialism--Ireland--History--20th century.
Spain--History--Civil War, 1936-1939--Participation, Irish.