Design & Art Australia online, viewed 10/16 (Geoffrey Raynor Hook b. 1928, Also known as Jeff, Jeff Hook, Geoffrey Hook, Geoff Hook, Artist (Painter), Artist (Cartoonist / Illustrator), Born Hobart, Tasmania) https://www.daao.org.au/bio/geoffrey-raynor-hook
Dunstan, K. Footy, an Aussie rules dictionary, 1983 t.p. (Jeff Hook) Aus. CIP (Hook, Jeff, 1928- ) cover (Sun news-pictorial cartoonist)
Dunstan, K. It's all up hill, 1979 t.p. (Jeff) p. 2 (Geoffrey Hook signs his name "Jeff" with trademark, a hidden fish hook to represent last name)
LC data base, 10-18-84 (hdg.: Hook, Jeff; usage: Jeff)
Wikipedia 22 January 2017 (Geoff Hook OAM (born 27 December 1928 in Hobart, Tasmania), better known as Jeff Hook, is an Australian artist and former editorial cartoonist)
Author website accessed 23 July 2018: (Sadly we have to report that Geoff passed away in hospital on the morning of the 20th of July 2018) http://www.geoffhook.com/