Columbia subject headings:
Oropos (Extinct city)--Rural conditions.
Harvard subject headings:
Archaeological surveying--Greece--Ōrōpos.
Excavations (Archaeology)--Greece--Ōrōpos.
Ōrōpos (Greece)--Antiquities.
Ōrōpos (Greece)--History.
Princeton subject headings:
Oropos (Extinct city)--Rural conditions.