| Title |
Comment |
Keywords |
|
The United States Geological Survey: 1879-1989
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n.a. / n.a.
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USGS, history, public land use policy, federal science policy, mapping policy, policy, mineral resource
|
|
Geology's Influence on Civilization
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25:09 - 26:17 (01:08) / 1.5 MB
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"James Sadd", civilization, history, "geologic hazard", resource, geologist
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Geology School Keywords
|