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→參考書目
*《2010 Census Data》、publisher=United States Census Bureau、2012.12.30
*《Arizona's Dark and Bloody Ground; an authentic account of the sanguinary Pleasant Valley vendetta that swept through Arizona's cattleland in the latter eighteen eighties--the Graham-Tewksbury feud》、author= Earle R. Forrest、publisher =Caxton Printers, Ltd 、193、1936
*《Scouting on Two Continents》、author= Frederick Russell Burnham、publisher =Doubleday, Page & company、1926