A great place to start a research project. More than 27,00 annotated citations to publications dating from 1961 to 1992 covering 48 periods in world history.
A procedure manual for writing term papers in history. Covers everything from selecting a topic to the mechanics of gathering information from various sources in historical literature.
Dictionary of Afro-American Slavery by 
Encyclopedia of African American Culture and History by 
Encyclopedia of African-American Civil Rights by 
Encyclopedia of Southern Culture by 
The Historical Encyclopedia of World Slavery [2 Volumes] by 