Updating from Library of Congress

I have a growing list of e-books in my EN library, most of which have a complete publisher’s record on the Library of Congress database.  However, I think the “Update References” feature works off PubMed and Web of Science only and does not reference the Library of Congress.

Is there a way to force the reference updater to search the Library of Congress?  I realize I can cut and paste each book title into the search engine, but that is going to be exceedingly tedious!