01499oam 2200409 450 991070709460332120180508091237.0(CKB)5470000002460537(OCoLC)896810833(OCoLC)995470000002460537(EXLCZ)99547000000246053720141123d1986 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierObservations of the eruptions of July 22 and August 7, 1980, at Mount St. Helens, Washington /by Richard P. HoblittReston, Virginia :Department of the Interior, U.S. Geological Survey,1986.1 online resource (vii, 44 pages) illustrations, mapsU.S. Geological Survey professional paper ;1335"A description and discussion of pyroclastic density flows and other eruptive phenomena."Includes bibliographical references (pages 38-39).Saint Helens, Mount (Wash.)Eruption, 1980Washington (State)Mount Saint HelensfastHoblitt Richard P.1412263Geological Survey (U.S.),COPCOPOCLCOOCLCFCUSGPOBOOK9910707094603321Observations of the eruptions of July 22 and August 7, 1980, at Mount St. Helens, Washington3505251UNINA