01915oam 2200541 450 991071167240332120181206080950.0(CKB)5470000002485335(OCoLC)965931955(OCoLC)953211566(OCoLC)995470000002485335(EXLCZ)99547000000248533520161213d1980 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierMount St. Helens volcanic-ash fall in the Bull Run Watershed, Oregon, March-June 1980 /by Michael V. Shulters and Daphne G. Clifton[Reston, Va.?] :United States Department of the Interior, Geological Survey,1980.1 online resource (v, A15 pages) illustrations, mapsGeological Survey circular ;850-AHydrologic effects of the eruptions of Mount St. Helens, Washington, 1980Includes bibliographical references (page A15).Volcanic ash, tuff, etcOregonVolcanic ash, tuff, etcfastSaint Helens, Mount (Wash.)Eruption, 1980Bull Run River Watershed (Or.)OregonfastOregonBull Run River WatershedfastWashington (State)Mount Saint HelensfastVolcanic ash, tuff, etc.Volcanic ash, tuff, etc.Shulters M. V.1950-1415502Clifton Daphne G.Geological Survey (U.S.),OCLCEOCLCEOCLCOCOPOCLCFOCLCQOCLCOOCLCAGPOBOOK9910711672403321Mount St. Helens volcanic-ash fall in the Bull Run Watershed, Oregon, March-June 19803517792UNINA