Citations
Through a trench. Last Triangulation Base measured by Invar Topes in Nigeria, 1928 - 1939, GBR/0115/RCS/Y3043GG/117. Cambridge University Library. |
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Through a trench. Last Triangulation Base measured by Invar Topes in Nigeria, 1928 - 1939, GBR/0115/RCS/Y3043GG/117. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/860411 Accessed January 15, 2025. |