Nongŏp kwa ch'ŭgugi /

by Yi, Tu-sun, Yi, Tu-sun, Yi, Tu-sun
Published 2015

Sinyŏk Chasan ŏbo /

by Yi, Tu-sun
Published 2016

Piryo ŭi suyo yechʻŭk kwa chŏkchŏng chaego e kwanhan yŏnʼgu : Kang Chŏng-il...[et al] /

Published 1984

Yangjam kyŏngyŏng siltae punsŏk /

by Yi, Chʻung-ung
Published 1983

Piryo sugŭp e kwanhan yŏnʼgu : Kang Chŏng-il, Yi Tu-sun, Chʼoe Chi-hyŏn /

by Kang, Chŏng-il
Published 1983

Chuyo nongjangmul chongja saengsan mit konggŭp chʻegye kaesŏn e kwanhan yŏnʼgu /

by Yun, Ho-sŏp
Published 1985

Chiryŏk chŭngjin ŭi kyŏngjesŏng punsŏk /

by Yi, Chʻung-ung
Published 1982

P'yŏngyŏk Nanho Ŏmyŏnggo /

by Sŏ, Yu-gu, 1764-1845
Published 2015