Perhaps you should try some spelling variations:
"classical sources library" » "classical studies library", "classical spaces library", "classic sources library", "classical forces library", "classical resourcess library", "classical resource library", "classical series library"
"classical source library" » "classic source library", "classical force library", "classical resources library", "classical source libraries"
"classical core library" » "classical codes library", "classical case library", "classical charge library", "classical code library", "classical core libraries"

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 (\"classical source library\"))) OR (\"classical core library\"))".
• Removing quotes may allow a broader search: (((( classical sources library ) OR ( classical source library ))) OR ( classical core library )).
• Adding a wildcard symbol may retrieve word variants: (((("classical sources library") OR ("classical source library"))) OR ("classical core library"))*.