1) Arbiter 2) Arbiter with a whistle 3) Arbitrator 4) Arena arbiter 5) Arena zebra 6) Athletic arbiter 7) Authority on a field 8) Ball caller 9) Basketball arbiter 10) Basketball judge 11) Basketball official 12) Blow monitor 13) Blow the whistle 14) Bout arbiter 15) Bowl game whistler 16) Bowl off Found on https://www.crosswordclues.com/clue/ref
[International Name] The REF (Institution of Elite Training) is a Russian institution of various locations spread throughout Russia. It is a prestigious but somewhat obscure educational institute. The schools have been criticized in the latter years. Demid Kyznetsov is currently its chairman. == 7 Largest Branches == 1. Moscow 2. St. Peters... Found on http://en.wikipedia.org/wiki/REF_(International_Name)_Institution_of_Elite_
(from the article `Islamic arts`) ...of Fantasy`) by the prolific writer Fatt of Nshpr (died 1448) and Gy o-chowgn (`Ball and Polo-stick`) by `ref (died 1449); the latter work is an ... Found on http://www.britannica.com/eb/a-z/a/97