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Citations

‘The Return of Halley’s Comet’ stamps: first day covers and stamped postcard, 1986-02 - 1986-11, GBR/0180/RGO 97/5. Cambridge University Library.

‘The Return of Halley’s Comet’ stamps: first day covers and stamped postcard, 1986-02 - 1986-11, GBR/0180/RGO 97/5. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/107513 Accessed December 22, 2024.

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