1958 Solution to problem on the numero puzzle, set by Professor T G Room. Note his comment on the solution.

McKellar, Bruce H., 1958 Solution to problem on the numero puzzle, set by Professor T G Room. Note his comment on the solution. (1958), [UMA-IT-000003238]. University of Melbourne Archives, accessed 13/11/2025, https://archives.library.unimelb.edu.au/nodes/view/465809