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Citations

Observations with Troughton's mural circle, 1821, GBR/0180/RGO 5/73. Cambridge University Library.

Observations with Troughton's mural circle, 1821, GBR/0180/RGO 5/73. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/98017 Accessed December 24, 2024.

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