Hunminjeongeum(Korean Alphabet) Joseonwangjosillok (Annals of Joseon Kingdom, 2,077volumes) Seungjeongwonilgi (Original Copy:Gyujanggak Archives, Facsimile Edition:National Institute of Korean History) Jikjisimcheyojeol (Printed Facsimile Edition: Heungdeoksa Temple site, Cheongju Early Printing Museum)