Citations
Don Josef de Porras y Ruiz's method using the variation of the needle, 1784 - 1785, GBR/0180/RGO 14/38: 95-109. Cambridge University Library. |
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Don Josef de Porras y Ruiz's method using the variation of the needle, 1784 - 1785, GBR/0180/RGO 14/38: 95-109. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/110089 Accessed November 29, 2024. |