Primary literature refers to original texts, which may include various formats--diaries, newspaper articles, or sermons, for example. Search MARQCAT to discover the library's editions of a particular author. The library collections on this page are digital collections of primary works--books and newspapers --mostly from earlier centuries.
Historic Iowa Children's Diaries (digital collection from the University of Iowa Libraries, State Historical Society of Iowa, and more) is a great resource for examining the lives of children in the 1870s. Covers diaries of young Iowans 1862-1907 with a browse feature by decade.