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  1. 141
    Geology of the igneous rocks of the Spanish Peaks region, Colorado /
    by Johnson, Ross B., 1919-
    Published 1968
    “...Geological Survey professional paper ;...”
    Government Document Book
  2. 142
    Critical review of the San Juan peneplain, southwestern Colorado /
    “...Geological Survey professional paper ;...”
    Government Document Book
  3. 143
    Palmlike plants from the Dolores formation (Triassic), southwestern Colorado /
    “...Geological Survey professional paper ;...”
    Government Document Book
  4. 144
    Geology of Precambrian rocks, Central City district, Colorado /
    “...Geological Survey professional paper ;...”
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    Government Document eBook
  5. 145
    Ash flows and related volcanic rocks associated with the Creede caldera, San Juan Mountains, Colorado /
    “...Geological Survey professional paper ;...”
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    Government Document eBook
  6. 146
    Petrology and structure of Precambrian rocks, Central City quadrangle, Colorado /
    “...Geological Survey professional paper ;...”
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    Government Document eBook
  7. 147
    Dakota group in Northern Front Range Foothills, Colorado /
    “...Geological Survey professional paper ;...”
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    Government Document eBook
  8. 148
    Palmlike plants from the Dolores formation (Triassic), southwestern Colorado /
    “...Geological Survey professional paper ;...”
    Get full text
    Government Document eBook
  9. 149
    Cretaceous plants from southwestern Colorado /
    “...Geological Survey professional paper ;...”
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    Government Document eBook
  10. 150
    Nonmarine mollusks of late Cretaceous Age from Wyoming, Utah and Colorado /
    by Yen, Teng-Chien
    Published 1954
    “...Geological Survey professional paper ;...”
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    Government Document eBook
  11. 151
    Metamorphism and the origin of granitic rocks, Northgate District, Colorado /
    “...Geological Survey professional paper ;...”
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    Government Document eBook
  12. 152
    Abundance and distribution of thorium in the carbonatite stock at Iron Hill, Powderhorn District, Gunnison County, Colorado /
    “...Geological Survey professional paper ;...”
    Government Document Book
  13. 153
    Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado /
    “...Geological Survey professional paper ;...”
    Government Document Book
  14. 154
    Rock units of the Precambrian basement in Colorado /
    by Tweto, Ogden, 1912-1983
    Published 1987
    “...U.S. Geological Survey professional paper ;...”
    Government Document Book
  15. 155
    Geochemical variability of soils and biogeochemical variability of plants in the Piceance Basin, Colorado /
    Published 1986
    “...Geological Survey professional paper ;...”
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    Government Document eBook
  16. 156
    Geochemical variability of soils and biogeochemical variability of plants in the Piceance Basin, Colorado /
    Published 1986
    “...Geological Survey professional paper ;...”
    Government Document Book
  17. 157
    Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado /
    “...Geological Survey professional paper ;...”
    Government Document Book
  18. 158
    Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado /
    “...Geological Survey professional paper ;...”
    Get full text
    Government Document eBook
  19. 159
    Rock units of the Precambrian basement in Colorado /
    by Tweto, Ogden, 1912-1983
    Published 1987
    “...U.S. Geological Survey professional paper ;...”
    Get full text
    Government Document eBook
  20. 160
    Abundance and distribution of thorium in the carbonatite stock at Iron Hill, Powderhorn District, Gunnison County, Colorado /
    “...Geological Survey professional paper ;...”
    Get full text
    Government Document eBook
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