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1889 Cave Valley, Nevada. Exploration Book Plan and section of cave in … |
1889 Crossing, Colorado River nea … Exploration Book Crossing of the Colorado Riv … |
1889 Map, river and land parties, … Exploration Book Map showing routes of the ri … |
1877 Topographical sketch, observ … Exploration Book Topographical sketch showing … |
1877 Apparatus for determining ab … Exploration Book Apparatus for determining ab … |