Private and confidential correspondence - Aviation spirit, May 1919 - Sep. 1923; petrol substitutes, May 1920 - Aug. 1922. Vol. 79, SR5B

Shell Australia Limited, Private and confidential correspondence - Aviation spirit, May 1919 - Sep. 1923; petrol substitutes, May 1920 - Aug. 1922. Vol. 79, SR5B (1919-1923), [UMA-ITE-2008004501339]. University of Melbourne Archives, accessed 17/01/2026, https://archives.library.unimelb.edu.au/nodes/view/309728