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Yŏng-sik Kim

1930

  • Hanʼguk kyoyuk haengjŏng ŭi kwaje wa ironjŏk chŏpkŭnHanʼguk kyoyuk haengjŏng ŭi kwaje wa ironjŏk chŏpkŭn
  • 과학혁명과학혁명