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19th century
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1870s
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1875
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Geology -- Arizona.
Geology -- California.
Geology -- Colorado.
Geology -- Nevada.
Geology -- New Mexico.
Geology -- Utah.
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Book
Report upon geographical and geological explorations and surveys west of the one hundreth meridian / in charge of M. Wheeler upon the direction of A.A. Humphreys.
1875
United States. Army. Engineer Department
Book
Report upon geographical and geological explorations and surveys west of the one hundreth meridian / in charge of M. Wheeler upon the direction of A.A. Humphreys.
1875
United States. Army. Engineer Department
Book
Report upon geographical and geological explorations and surveys west of the one hundreth meridian / in charge of M. Wheeler upon the direction of A.A. Humphreys.
1875
United States. Army. Engineer Department
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