Citations
Mirror transit circle specification, 1963, GBR/0180/RGO 9/274. Cambridge University Library. |
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Mirror transit circle specification, 1963, GBR/0180/RGO 9/274. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/99789 Accessed March 12, 2025. |