Columbia subject headings:
O family--Homes and haunts--Korea (South)--Koryŏng-gun.
Rites and ceremonies--Korea (South)--Koryŏng-gun.
Harvard subject headings:
O family--Homes and haunts--Korea (South)--Koryŏng-gun.
Rites and ceremonies--Korea (South)--Koryŏng-gun.
Princeton subject headings:
Korea (South)--Biography.
Korea (South)--Description and travel.
Korea--Biography.
Korea--Social life and customs--Sources.
Koryŏng-gun (Korea)--History--Sources.
O family--History.
O, Un--Family--History.