Murray, Andrew D. The Skyline Synod: Presbyterianism in Colorado and Utah. Denver, Colorado: Golden Bell Press, 1971. 
Blue cloth with gilt titles, 6 x 9 1/4 inches, 151 clean pp., illustrated with b/w photos. Very good. Hardcover.
Begins with an account of the Presbyterian Home Mission Organization and has chapters on the Rocky Mountains, Sheldon Jackson, and the decades from the 1850's to the 1930's. Includes bibliography, index, lists of synods and officers, state maps of Presbyterian churches, &c.