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Sae nongyak sayongpŏp
Chong-ik Kim, Sang-hwa Yun, Ok-sŏn Hŏ · Yŏnbyŏn Inmin Chʻulpʻansa
117 sayfa · 1983
Pesticides / Handbooks, manuals / Agricultural chemicals
Puksae kiryak
Sŏng-p'il Son, Se-ok O, Chŏng-uk Yi, No-gyu Kim, Hong, Yang-ho, Ŭi-yŏng Hong, Pŏm-yun Yi · Han'guk Kojŏn Pŏnyŏgwŏn
453 sayfa · 2018
Local History / Description and travel / Sources / Historical geography / Boundaries