400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=Dictionnaire+général+des+droits+d'enregistrement+timbre,+greffe,+d'hypothèques,+successions,+mutations+par+décès,+etc.,+Belgique 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.