"Seals (Numismatics) Korea History." . . "Seals (Numismatics) Korea Pictorial works." . . "Kungnip Chungang Tosŏgwan (Korea)" . . "국립 중앙 도서관 (Korea)" . . . . . "Yet munsŏ wa chʻaek esŏ manna pon ŏbo" . . . "옛 문서 와 책 에서 만나 본 어보" . . . "Ŏbo" . "어보" . "Korea" . . . .