Franklin, the Penn Library's online catalog, lists more than four million books, journal titles, and other materials contained in campus libraries. Note: The Biddle Law Library has its own completely separate catalog, LOLA.
You can search Franklin by author, title, journal title, subject, or keyword. For information on searching, consult Franklin Search Help.
Keyword: Use keyword searching to combine concepts (X AND Y) and to search for particular words or phrases that might appear in titles or notes or subjects. In the first example below keyword searches the words "mexican" and "revolution" separately, i.e., not as a phrase. In the third example the quotes search the phrase:
Subject: The keyword searches above result in different numbers of books and other publications (note under the "Format" filter on the left of each set of search results, one can limit the results to "Book," "Video," "Government document," etc.). As one goes through each of the results, it will become clear that some Library of Congress subject headings are used frequently in books and other publications about the Mexican Revolution. The most common is the subject heading that begins Mexico -- History -- Revolution, 1910-1920 . To see the Revolution in a wider context there are broader subject headings starting with Mexico -- History, or, slightly more restricted, Mexico -- History -- 20th century. A few other relevant subject headings are listed below.
Note that in some of the subject headings there is a subheading "Sources," which usually indicates a work that is a collection of historical documents, or primary sources. Primary sources, however, are not found exclusively under that subheading. The subheading "Personal narratives" can also indicate primary sources in the voices of participants in historical events. Memoirs and autobiographies by historical figures also count as primary sources. Other terms that appear as subheadings include "Diaries," "Interviews," "Correspondence." It is worth noting that there are a number of non-book items that clearly qualify as primary sources. These could be online collections of digitized documents, as well as a variety of historical documents, such as the publications of political parties, eyewitness accounts, written and pictorial works, poetry and prose, songs and hymns. Videos in the collection can provide another source of primary information.