TY - RPRT TI - Catastrophic eruptions of the directed-blast type at Mount St. Helens, Bezymianny and Shiveluch volcanoes AU - G.E. Bogoyavlenskaya AU - O.A. Braitseva AU - I.V. Melekestsev AU - V. Yu Kiriyanov AU - Miller C. Dan PY - 1985 DO - 10.1016/0264-3707(85)90035-3 UR - https://pubs.usgs.gov/publication/70012928 ID - 70012928 ER -