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1889 Cave Valley, Nevada. Exploration Book Plan and section of cave in Cave Valley, … |
1889 Crossing, Colorado River near Paria Cree … Exploration Book Crossing of the Colorado River near mout … |
1889 Map, river and land parties, exploring G … Exploration Book Map showing routes of the river and land … |
1877 Topographical sketch, observatory site, … Exploration Book Topographical sketch showing observatory … |
1877 Apparatus for determining absolute perso … Exploration Book Apparatus for determining absolute perso … |