Readex, a division of NewsBank since 1984, publishes collections of primary source research materials. In the early 1940s, publisher Albert Boni, co-founder of the Modern Library, formed the Readex Microprint Corporation in New York City and Chester, Vermont. In 1955, the American Antiquarian Society invited Readex to publish in microprint Early American Imprints, Series I: Evans, 1639-1800. This partnership led to the publication of Early American Imprints, Series II: Shaw-Shoemaker, 1801-1819 and Early American Newspapers, Series 1, 1690-1876.