Title: Chechʻŏn, Kŭmsŏng sŭkʻarŭn hwisuyŏn kwangsan ŭi chijil kwangsang mit kaebal kyŏngjesŏng chosa yŏnʾgu
Subjects: Molybdenum ores, Molybdenum mines and mining
Places: Korea (South), Chechŏn-gun