Columbia subject headings:
Harvard subject headings:
Hellas Liberty (Ship)
Liberty ships--Greece--History--Pictorial works.
Merchant marine--Greece--History--Pictorial works.
Ships--Greece--History--Pictorial works.
Princeton subject headings:
Hellas Liberty (Ship)--Pictorial works.
Liberty ships--Greece--History--Pictorial works.
Merchant marine--Greece--History--20th century--Pictorial works.
Ships--Greece--History--20th century--Pictorial works.