Map of Utah Territory compiled and drawn by Charles Mahon, J.H. Renshawe, W.H. Graves and H. Lindenkohl. Dept. of the Interior, U.S. G. and G. Survey, J.W. Powell in charge. Atlas sheet no. 8, Geology of the high plateaus of Utah by Capt. C.E. Dutton, U.S.A. (Julius Bien, Lith., New York, 1879)