The Santa Fe Trail: Simmons, M. Highway of commerce.--The Oregon Trail: Stegner, W. Road to destiny.--The Mormon Trail: McCarry, C. Marching to Zion.--The California Trail: Laxalt, R. To the rainbow's end.--The Gila Trail: Dedera, D. Pathway in the desert.--The Boseman Trail: Haba, L. North from the Platte.