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State Library of NSW
Letter from David Unaipon to Dr Herbert Basedow, 21 April 1914, page 71914
Herbert Basedow - Papers, 1856-1932, 1941; with incidental papers of Professor Ralph Tate, 1879-1899
I have had my invention patented for the Commonwhealth:
Improved Mechanic Motion Device
It can be indifinetly applied to other [part?] in machinery.