TY - RPRT TI - Bimodal Density Distribution of Cryptodome Dacite from the 1980 Eruption of Mount St. Helens, Washington AU - R. Hoblitt AU - R.S. Harmon PY - 1993 DO - 10.1007/bf00302002 UR - https://pubs.usgs.gov/publication/70017403 ID - 70017403 ER -