Winning the Wild West : the epic saga of the American frontier 1800-1899

 Stegner, Page; McMurtry, Larry;

New York : The Free Press , 2002

The American west :a new interpretative history

 Hine, Robert V.; Faragher, John Mack;

New Haven : Yale University Press , 2000

the new encyclopedia of the american west

 Lamar, Howard R.;

New Haven : Yale University Press , s.a.