Perhaps you should try some spelling variations:
sources library » resource library, sources linear, series library
studies library » studies literary, studies libraries, itunes library
source library » resource library, source libraries, core library

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"classical ((sources library) OR (source library))\\") or (\\"classical studies library\\"))\"".
• Removing quotes may allow a broader search: (( classical ((sources library) OR (source library)) ) or ( classical studies library )).