I'm sure there are several caveats to this strategy (i.e. ailments beneath which Referer just isn't sent, probable for being spammed through bogus Referer URLs), but I am unable to speak to all of them. The Wikipedia web site may be a great place to begin. Use the available ones, https://titusfihfd.blogthisbiz.com/41002048/a-secret-weapon-for-backlink