An interesting article on the referee Abraham Klein was recently published in The Guardian, a British newspaper. You can read it here:
We found this article be very revealing about the politics (that we always knew about anyway!) that go into the selection of referees for World Cups and for matches during those tournaments. The article also included accounts of the strenuous efforts Klein went to in order to keep fit, back in the days without personal trainers and all the other high-tech equipment, monitoring and supervision that present day top-level referees enjoy.