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2. Eagles Nest Wilderness
3. Eagles Nest Wilderness, Colorado, Slate Creek Addition
4. Early Permian vertebrates from the Cutler Formation of the Placerville area, Colorado,
5. Early pueblo ruins in the Piedra district, southwestern Colorado
6. The Echo Park controversy
7. Economic development from new generation and transmission in Wyoming and Colorado
8. Economic development impacts of Colorado's first 1000 megawatts of wind energy
9. Economic development in telecommunications, computers, and electronics : the educational component : hearing before the Subcommittee on Telecommunications, Consumer Protection, and Finance of the Committee on Energy and Commerce, House of Representatives, Ninety-eighth Congress, first session, December 8, 1983
10. Economic geology of Gilpin county and adjacent parts of Clear Creek and Boulder counties, Colorado,
11. Economic geology of Gilpin county and adjacent parts of Clear Creek and Boulder counties, Colorado
12. Economic geology of the Georgetown quadrangle (together with the Empire district) Colorado
13. Economic geology of the Georgetown quadrangle (together with the Empire district) Colorado
14. Effect of drought on streamflow and stream-water quality in Colorado, July through September 2002
15. Effects of a landslide complex on sediment discharges and loads in the Muddy Creek drainage basin and deposition into Paonia Reservoir, west-central Colorado, 1986-87
16. The effects of atmospheric nitrogen deposition in the Rocky Mountains of Colorado and southern Wyoming : a synthesis and critical assessment of published results
17. Effects of organic wastes on water quality from processing of oil shale from the Green River Formation, Colorado, Utah, and Wyoming
18. Effects of the eruptions of Mount St. Helens on physical, chemical, and biological characteristics of surface water, ground water, and precipitation in the western United States
19. Effects of water quality and habitat on composition of fish communities in the Upper Colorado River Basin
20. Ekberg : Copper Spur Land Exchange
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