Bibliography of East Asian Periodicals (Colonial Korea 1900-1945) Union CatalogA group of Korean Studies Librarians & Scholars present a comprehensive bibliography that contains 913 periodicals from the colonial period (1910-1945), pre-colonial period (1896-1910), and post-colonial period from liberation in 1945 to the establishment of the Republic of Korea (ROK) and the Democratic People's Republic of Korea (DPRK) in 1948, covering subjects in every field–politics, economy, industry, society, literature, education, religion, women, children, medicine, science, friendship societies, etc.