Pong-yŏng Yu

1940

• Hanʼguk chibang chachʻi ŭi chiwi wa kinŭng yŏngyŏk e kwanhan yŏnʼgu
• Hanʼguk chibang chachʻi ŭi palchŏn chŏngchʻaek non
• Hanʼguk chibang chachʻi ŭi palchŏn chŏngchʻaengnon