Secret cables, Apr. 1938 - Aug. 1939. File no. 24.

Shell Australia Limited, Secret cables, Apr. 1938 - Aug. 1939. File no. 24. (1938-1939), [UMA-ITE-2008004501598]. University of Melbourne Archives, accessed 18/04/2026, https://archives.library.unimelb.edu.au/nodes/view/309987