TY - RPRT TI - Hydrogen isotope investigation of amphibole and glass in dacite magmas erupted in 1980-1986 and 2005 at Mount St. Helens, Washington AU - S.J. Underwood AU - T.C. Feeley AU - M.A. Clynne PY - 2013 DO - 10.1093/petrology/egt005 UR - https://pubs.usgs.gov/publication/70048003 ID - 70048003 ER -