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Colonial And Imperial Geological Surveys
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Geological Survey of India — establishment and early mapping campaigns (1851–1900)
1836 - 1900
15 entries
Geological Survey of Egypt — Nile, Sinai, and Red Sea geological campaigns (1880–1920)
1882 - 1925
12 entries
Dutch East Indies geological and mineral surveys in Java and Sumatra (1890–1930)
1850 - 1930
12 entries