01437nam 2200385Ka 450 991069731130332120080819101127.0(CKB)5470000002387823(OCoLC)244097570(EXLCZ)99547000000238782320080819d2003 ua 0engtxtrdacontentcrdamediacrrdacarrierFrequency of debris flows in Grand Canyon[electronic resource] /[Robert H. Webb, Peter G. Griffiths, Tillie A. Klearman] ; prepared in cooperation with the Grand Canyon Monitoring and Research Center[Reston, Va.] :U.S. Dept. of the Interior, U.S. Geological Survey,[2003]4 unnumbered pages digital, PDF fileUSGS fact sheet ;065-03Title from title screeen (viewed on Aug. 18, 2008)."August 2003."Includes bibliographical references (page [4]).Debris avalanchesArizonaGrand CanyonDebris avalanchesWebb Robert H123725Griffiths Peter G91313Klearman Tillie A1390048Geological Survey (U.S.)Grand Canyon Monitoring and Research Center.GPOGPOBOOK9910697311303321Frequency of debris flows in Grand Canyon3442319UNINA