Citations
NIGERIA 1:500,000 BENUE VALLEY GRAVITY SURVEY, CHAD BASIN GEOPHYSICAL SURVEY ; progress folder : authority for mapping, specs., source material, gravity overprint, sheet size diagrams, list of co-ords, letters., 1961-01-01 - 1963-12-31, GBR/3296/Maps/CCSA.DOS_298_1, DOS_298_1. Cambridge University Library. |
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NIGERIA 1:500,000 BENUE VALLEY GRAVITY SURVEY, CHAD BASIN GEOPHYSICAL SURVEY ; progress folder : authority for mapping, specs., source material, gravity overprint, sheet size diagrams, list of co-ords, letters., 1961-01-01 - 1963-12-31, GBR/3296/Maps/CCSA.DOS_298_1, DOS_298_1. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/238366 Accessed November 13, 2024. |