^"SKETCHER". The Queenslander. No. 2454. Queensland, Australia. 28 March 1914. p. 8. Archived from the original on 2 December 2020. Retrieved 18 November 2018 – via National Library of Australia.
^"Calcium North". Queensland Minerals. Archived from the original on 17 November 2018. Retrieved 18 November 2018.