You can locate items in the library by searching Omni by keyword or subject heading.
Think of the words that best describe your topic and then connect them with the boolean operators AND OR NOT and then add one of the special subject terms to your search:
mexico AND revolution AND sources
Subject Heading Search
In Advanced Search, type in subject heading and then add subject sub-heading.
Cuba History Revolution 1959 Personal Narratives
Latin America History Sources
Latin America History 20th century Sources
Mexico History Revolution 1910 1920 Sources
Revolutionaries Mexico Chiapas Correspondence
If you know of a person involved in the event or from the time period, search the person's name as an author (or subject) for memoirs, diaries, and correspondence.
For example, in Advanced Search, type:
Author/Creator is (exact) Castro Fidel
Subject is (exact) Castro Fidel
Author/Creator is (exact) Guevara Che
Subject is (exact) Guevera Che