Title: The Army Surveys of Gold Rush California
Subjects: United states, army, officers, Frontier and pioneer life, california, Topographical surveying, Engineers, Sources, Gold discoveries, History, Environmental conditions, Frontier and pioneer life, Geography, Diaries, Officers, HISTORY / United States / State & Local / West (AK, CA, CO, HI, ID, MT, NV, UT, WY), HISTORY / United States / 19th Century, HISTORY / Military / United States, United States. Army, United States, Armed Forces, Ecology, Gold mines and mining