400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=Dictionnaire+des+ouvrages+anonymes+et+pseudonymes+composés,+traduits+ou+publiés+français,+avec+les+noms+des+auteurs,+traducteurs+et+éditeurs...+antoine-alexandre+barbier 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.