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Bibliography - U
- 'Un Nouvea "Post-Office"', L'Echo de la Timbrologie, vol. 300, 31 October 1913, p. 91. [ Details... ]
- '[The utter fatuity of collecting very common postage stamps for charitable objects]', Stamp Collectors' Fortnightly, vol. 5, no. 109, 26 November 1898, p. 38. [ Details... ]