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Chosŏn hugi ŭisang kaesuron kwa ŭisang chŏngch'aek
Man-ok Ku · Hyean
430 sayfa · 2019
Astronomical instruments / History / Astronomical clocks / Astronomical observatories / Astronomy
Chosŏn hugi kwahak sasangsa yŏnʼgu
Man-ok Ku · Hyean
Sayfa sayısı yok · 2004
History / Philosophy and science / Neo-Confucianism / Cosmology