404. That’s an error.

The requested URL /bookmarks/mark?op=edit&bkmk=https%3A%2F%2Fdata.bnf.fr%2Ffr%2F12185616%2Ffrance_commissariat_general_du_plan__comite_consommation%2F&title=France.+Commissariat+g%C3%A9n%C3%A9ral+du+plan.+Comit%C3%A9+Consommation was not found on this server. That’s all we know.