Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Russia (Federation)--Gdov.
Fortification--Russia (Federation)--Gdov.
Gdov (Russia)--Antiquities.
Princeton subject headings:
Architecture, Medieval--Russia (Federation)--Gdov.
Fortification--Russia (Federation)--Gdov.
Gdov (Russia)--Buildings, structures, etc.