Sunwheel , Planet Pinion, Annulus Gear

Michell, Anthony G., Sunwheel , Planet Pinion, Annulus Gear (18 December 1925-4 January 1926), [UMA-ITE-2007006801277]. University of Melbourne Archives, accessed 01/05/2026, https://archives.library.unimelb.edu.au/nodes/view/314010