7513933MACKAY J.G. : Death 31 Dec 1938 Unknown0public2018-09-28 13:54:292021-06-29 08:02:2020
1938-12-314310610MACKAY, JOHN GILBERT494552211938 'DR. J. G. MacKAY DEAD', Barrier Miner (Broken Hill, NSW : 1888 - 1954), 31 December, p. 5. (SPORTS EDITION), viewed 28 Sep 2018, http://nla.gov.au/nla.news-article479909974310610MACKAY, JOHN GILBERT
 1125https://heurist-usyd.cloud.edu.au/heurist/ExpertNationDeath1125-331