Note 25 — III A CENTURY OF GEOLOGY.—STEPS OF PROGRESS IN THE INTERPRETATION OF LAND FORMS
Reading edition
Powell, J. W., Exploration of the Colorado River of the West, 1875. For Powell’s preliminary article see this Journal, 5, 456–465, 1873.
Reading edition
Powell, J. W., Exploration of the Colorado River of the West, 1875. For Powell’s preliminary article see this Journal, 5, 456–465, 1873.