Citations
Trig and levelling bulletin no 187, 1949-04, GBR/3296/Maps/CCSA.FJ_205_32/10, FJ_205_32/10. Cambridge University Library. |
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Trig and levelling bulletin no 187, 1949-04, GBR/3296/Maps/CCSA.FJ_205_32/10, FJ_205_32/10. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/246152 Accessed May 15, 2025. |