Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
Contents
Peneplains of the Front Range and Rocky Mountain National Park, Colorado / by Willis T. Lee -- Erosion and sedimentation in the Papago Country, Arizona, with a sketch of the geology / by Kirk Bryan -- A method of measuring and plotting the shapes of pebbles / by Chester K. Wentworth -- A field study of the shapes of river pebbles / Chester K. Wentworth -- Physiographic provinces and sections in western Oklahoma and adjacent parts of Texas / N.M. Fenneman.