400. That’s an error.
Google cannot redirect you to http://worldcat.org/search?q=Italia+sacra+sive+Episcopis+Italiae,+et+insularum+adjacentium,+rebusque+ab+iis+praeclare+gestis+...+opus+singulare,+provinciis+XX+distinctum+...+auctore+D.F.+Ughello+ferdinando+ughelli because the request was invalid.
This might be because the link was created a long time ago. Try your search again on Google. That’s all we know.