Title: Noksuk kochʻu ŭi chŏon chŏjang e ttarŭn chongja kalbyŏn e kwanhan saengni hwahakchŏk yŏnʼgu oe pu nonmun 21-pʻyŏn
First published: 1971
LC classification: MLCMK 2006/00176 (H)