4hak tongsa
4학통사(四學通事)
RO :
4hak tongsa
MC :
4hak t’ongsa
Year :
1393-1894
Categories :
Diplomacy·International Relations>Diplomatic Institutions·Embassies
UF :
Sahak tongsa
RT :
4hak@Eohak
BT :
Tongsa@Joseon