Title: Yŏnhaeju K'ŭrasŭk'ino Parhaesŏng 2017-yŏndo palgul chosa
Subjects: Antiquities, Civilization, Excavations (Archaeology), Historic sites, Fortification
Places: Bohai (Kingdom), Korea, Primorskiĭ kraĭ (Russia), Russia (Federation), Primorskiĭ kraĭ, Korea (North), Asia
Time periods: To 935