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