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Discovery and exploration
Explorations and surveys
2
Geology
2
Pacific railroads
2
Surveys
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Ackerman Lithr
Blake, William P. (William Phipps), 1826-1910
2
United States. Army. Corps of Topographical Engineers
2
United States. War Department. Office of P.R.R. Surveys
2
Williamson, R. S. (Robert Stockton), 1824-1882
2
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collection
Maps of North America
3
place
California
2
Oregon National Historic Trail
1
United States
1
West (U.S.)
1
genre
Maps
3
Geological cross-sections
2
publisher
War Dept., U.S. Pacific Rail Road Explorations & Surveys
2
publisher not identified
1
division
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Map Division
type
cartographic
3
still image
2
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Geological section along the …
Geological section of the Sie…
Map of a reconnoissance betwe…