WorldCat - Use WorldCat to expand your search for books, theses, etc. beyond the Five College area.
Use the SC Links button within WorldCat to access and populate the interlibrary loan forms. Watch for items that are owned by only one library; such unique material is often not obtainable via interlibrary loan.
Note that subject searching isn't always straightforward. Try a KEYWORDS ANYWHERE search to find a few relevant titles. Then click on the subject headings on those records to conduct a more comprehensive subject search.
Note that there are usually many different ways to search a concept, for example, segregation:
Requesting an Item - Use the Request Item button in the library catalog to request delivery of books from the other Five Colleges.