Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Korea (South)--Seoul.
Fortification--Korea (South)--Pʻungnap-tong (Seoul)
Korea (South)--Antiquities.
Seoul (Korea)--Antiquities.
Princeton subject headings:
Excavations (Archaeology)--Korea (South)--Seoul.
Fortification--Korea (South)--P'ungnap-tong (Seoul).
Korea (South)--Antiquities.
Seoul (Korea)--Antiquities.