Over the Mountains (An Aerial View of Geology) 38 copies, 1 review
An Introduction to Grand Canyon Geology 35 copies
A Land in Motion: California's San Andreas Fault 25 copies, 2 reviews
The geology of Denali National Park 11 copies
Floods, Droughts, and Climate Change 7 copies
Arizona: A View from Above 6 copies
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"Michael Collier" is composed of at least 4 distinct authors, divided by their works. You can edit the division.
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Michael Collier is composed of 3 names. You can examine and separate out names.