Use a Library Database Like Credo Reference to help you located background information.
Oxford Reference Online
Includes digitized, continuously updated entries from Oxford’s Dictionaries, Companions, and Encyclopedias.
Use the Library Discovery Service to find books with information
Using Research Databases to Find Articles, Reviews, etc. About Your Scientis
Go to the databases AFTER you've been in the Library Discovery Catalog. And make it easy on yourself. Simply do the SAME SEARCH you did in the catalog.
Your best databases are:
JSTOR ("Benjamin Banneker")
Helpful Search Tips:
Search/Explore the major discoveries and experiments that each of these scientists was involved with.