"Vernon (Nev.)" . . "Mining districts Nevada." . . "Mining Nevada." . . "Mining camps Nevada." . . "United States, Nevada, Pershing" . . "Seven Troughs (Nev.)" . . "Mazuma (Nev.)" . . "Pershing County (Nev.)" . . . "History" . . . . "History"@en . . . . . . "The story of Seven Troughs, Pershing County, Nevada : a little about the Seven Troughs Mining District, its people, its towns, its mines, its quest for water, and its promoters, all of which made an interesting chapter in the mining history of Nevada"@en . "The story of Seven Troughs, Pershing County, Nevada : a little about Seven Troughs Mining District, its people, its towns, its mines, its quest for water, and its promoters, all of which made an interesting chapter in the mining history of Nevada"@en . . . . . . . . . . . . . . . . . . . . . "The story of Seven Troughs, Pershing County, Nevada"@en . "Seven Troughs"@en . "The story of Seven Troughs, Pershing County, Nevada" . "Farrell (Nev.)" . . . .