400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=Geschichte+des+Klosters+Loccum.+Mit+Urkunden+einer+Kupfertafel.+Nach+Weidemanns+Manuscripte+bearb.+...+von+Friedrich+Burchard+Köster 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.