All materials cataloged in Mirlyn, the U-M Library's main tool for finding books, are described using Library of Congress Subject Headings. You may find it useful to explore these subject headings and incorporate them into your searches, in order to find relevant materials. You can use the "advanced" search options in Mirlyn to search specifically by subject.
It often works well to begin with broad keyword searches using the default setting across "all fields." Then, as you find relevant materials, make a note of their subject headings. You can use them in more refined and specific searches.
Sample subject headings that may help include:
Holocaust, Jewish (1939-1945)
Armenian massacres, 1915-1923
Genocide -- Rwanda
Genocide -- Cambodia
Cambodia -- Politics and Government -- 1975-1979
Africa, central -- Ethnic relations
Please note that subject headings for wars tend to follow a particular convention, such as:
World War, 1914-1918 -- atrocities
World War, 1939-1945 -- atrocities
Yugoslav War, 1991-1995 -- atrocities
Rwanda -- History -- Civil War, 1994
In order to find books in the library catalog (Mirlyn), start at http://mirlyn.lib.umich.edu.
From the basic search screen, you can search by author, title, keyword (all fields), or subject.
From the advanced search screen, you can combine searches. For example, you can search for a book by a particular author with a specific keyword in the title. You can also limit by library, publication date, language, etc.
All the basic information about an item is included in the Mirlyn record.