JSTOR specializes in making available the back issues of journals in a wide variety of humanities and social science disciplines. Issues are available both as images and as text, making searching possible both within each title and across the whole database.
Archives unbound collections are similar in nature to the First World War collection materials in terms of consisting of primary documents -- a little less friendly to use. Often reproduced from microfilm
Includes 21 books and over 700 articles. Search across articles using names of individuals, events, "world war I" or "First World War" (quotation marks important!), names of countries, battles, and so on.
Part of the Oxford Bibliographies Online database--seeks to focus on books that are based in extensive primary research and advance original or otherwise influential theses about ground-based military affairs on the western front from 1914 to 1918; it also includes a selection of some of the most authentic and compelling personal accounts of that theater of war.