01469nam 2200385 a 450 991069330600332120050822073345.0(CKB)5470000002362379(OCoLC)61310318(EXLCZ)99547000000236237920050822d2000 ua 0engurcn|---a||||txtrdacontentcrdamediacrrdacarrierRock-fall hazard assessment of the Aspen Forest Trail, Navajo National Monument, Arizona[electronic resource] /by Gerald F. Wieczorek and Edwin L. Harp[Reston, Va.] :U.S. Dept. of the Interior, U.S. Geological Survey,2000.U.S. Geological Survey open-file report ;00-305Imprint from transmittal sheet.Distributed to depositories in microfiche, shipping list no: 2002-0336-M.Includes bibliographical references (leaf 11).RockslidesArizonaNavajo National MonumentDebris avalanchesArizonaNavajo National MonumentRockslidesDebris avalanchesWieczorek Gerald F1381474Harp Edwin L1381375Geological Survey (U.S.)GPOGPOBOOK9910693306003321Rock-fall hazard assessment of the Aspen Forest Trail, Navajo National Monument, Arizona3430384UNINA