Key to what you get out of the computer is what you put into the computer. Catalogs and databases organize material into subject areas using controlled vocabularies so your word choice is very important. These systems prefer nouns.
Check out the link below for help developing a search strategy:
Below is a sampling of some of the subject headings you may want to use in your search. As most subjects (like historical figures or events) have their own subject headings, there are hundreds more.
Some special notes to keep in mind when searching in this area...
African Americans / African American + noun
Blacks / Black + noun
Africans / Africans + noun (example African Authors)
Black Arts Movement
Black militant organizations
Civil rights workers United States
Garvey, Marcus, 1887-1940
National Association for the Advancement of Colored People
Poor People's Campaign
Selma-Montgomery Rights March, 1965
When you've located a good title...