Citations
Robert Blair on an improvement to Hadley's quadrant, 1785-07-30, GBR/0180/RGO 14/29: 27-31. Cambridge University Library. |
|
Robert Blair on an improvement to Hadley's quadrant, 1785-07-30, GBR/0180/RGO 14/29: 27-31. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/109863 Accessed June 02, 2023. |