Columbia subject headings:
Harvard subject headings:
ELAS (Military organization)--Sources.
World War, 1939-1945--Greece--Thessaly--Campaigns.
World War, 1939-1945--Underground movements--Greece--Thessaly.
Princeton subject headings:
ELAS (Military organization)--Sources.
World War, 1939-1945--Campaigns--Greece--Thessaly--Sources.
World War, 1939-1945--Underground movements--Greece--Thessaly.