24 Apr. 2025 [K-Heritage News] [Yoo Woo-sik Column] The World's Oldest Metal Type Printing Record,『Sangjeonggogeumyemun』 and the Goryeo Dynasty Metal Type Book『Jabidoryangchambeopjiphae』

‘Mugujeonggyeong’ and ‘Nammyeong Jeungdoga’ listed in the printing chronology of the American Printing History Association ‘Nammyeong Jeungdoga’ certified version claimed to be the world’s oldest metal type book “138 years earlier than Jikji”… Attention in the world-renowned academic journal ‘Heritage’