Boolean operators can limit or expand searches depending on which one is used.
3rd Floor Index Tables Locate citations to authors in the Contemporary Authors series as well as many other Gale reference sources. Historical Abstracts is the leading database for historical research at the PSU library. Historical Abstracts contains abstracts of articles, book reviews, and other materials from around the world, excluding the United States and Canada, from 1450 to the present. The Humanities Index is a print index that allows the user to find citations to journal articles within the humanities. The Humanities Index can be searched by subject or by book reviews.