Aggradation and degradation of alluvial sand deposits, 1965 to 1986, Colorado River, Grand Canyon National Park, Arizona / by John C. Schmidt and Julia B. Graf ; prepared in cooperation with the U.S. Bureau of Reclamation (U.S. Geological Survey professional paper ; 1493)
Aggradation and degradation of alluvial sand deposits, 1965 to 1986, Colorado River, Grand Canyon National Park, Arizona / by John C. Schmidt and Julia B. Graf ; prepared in cooperation with the U.S. Bureau of Reclamation
(U.S. Geological Survey professional paper ; 1493)