Hong, Sa-jung. Segye munhwasa / Hong Sa-jung, Ham Hong-gŭn chŏ. - Sŏul : Chʻangsin Munhwasa, Tanʼgi 4294 [1961] - 328 p. : ill. ; 21 cm. Colophon inserted. LCCN: k 62000004 Subjects--Topical Terms: Civilization--History. LC Class. No.: CB113.K6 / H6