Columbia subject headings:
Harvard subject headings:
ELAS (Military organization)
ELAS (Military organization)--History--Sources.
World War, 1939-1945--Underground movements--Greece--Sources.
World War, 1939-1945--Underground movements--Greece.
Princeton subject headings:
ELAS (Military organization)
Greece--History--Civil War, 1944-1949.
Greece--History--Occupation, 1941-1944.