TY - RPRT TI - Fumarole emissions at Mount St. Helens volcano, June 1980 to October 1981: Degassing of a magma-hydrothermal system AU - T.M. Gerlach AU - T. J. Casadevall PY - 1986 UR - https://pubs.usgs.gov/publication/70015683 ID - 70015683 ER -