Citations
Bicentenary of the Armagh Observatory stamps: first day cover and special issue stamped envelope, 1990-10-16, GBR/0180/RGO 97/9-10. Cambridge University Library. |
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Bicentenary of the Armagh Observatory stamps: first day cover and special issue stamped envelope, 1990-10-16, GBR/0180/RGO 97/9-10. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/107517 Accessed March 31, 2023. |