I need to find information about the history of Brazilian Jiu Jitsu.
If you specifically want to research the history of Brazilian Jiu-Jitsu, a good method would be to find information about the Gracie family, as they are the creators of the system. The Gracie Way is the closest thing to an official biography of the family. The closest library that owns this book is in San Antonio. If you wish, COM Library can attempt to acquire this book through interlibrary loan.
You can also look for articles on Brazilian Jiu-Jitsu or the Gracies in our databases. EBSCO MasterFile Premier is the ideal database for this topic. Try searching for jiu-jitsu or "helio gracie" (include the quotes).
If you are unable to find enough information, you might consider expanding your topic to include the history of jiu-jitsu in general. Japan's ultimate martial art is specifically about the history of the system, though it does not specifically discuss the Brazilian form. This book is available at nearby libraries and could be acquired either through interlibrary loan or the TexShare program.