Irhwa ro t'ŏdŭk hanŭn palmyŏng myori
By: chipp'il paksa pugyosu Chang Myŏng-hŭi, Chŏn Ch'ung-il
Contributors: Chŏn, Ch'ung-il, author
Publisher: Chosŏn Ch'ulp'anmul Such'uripsa
Published: 2018
Place of publication: P'yŏngyang-si
Language: kor
Number of pages: 209
ISBN-13: 9789946295237
Subjects: Inventions; Anecdotes; History; Inventors
Other titles: Palmyŏng myori