Sir John '' Black Jack '' McEwen, GCMG, CH -LRB- 29 March 1900 â '' 20 November 1980 -RRB-, was an Australian politician and the 18th Prime Minister of Australia.
Sir John McEwen -RB- 29 mars 1900 â '' 20 novembre 1980 -RRB- Ã © tait le 18e premier ministre de l'Australie.