TY - RPRT TI - Sedimentology and clast orientations of the 18 May 1980 southwest- flank lahars, Mount St. Helens, Washington AU - Jon J. Major AU - B. Voight PY - 1986 DO - 10.1306/212f8a1c-2b24-11d7-8648000102c1865d UR - https://pubs.usgs.gov/publication/70217595 ID - 70217595 ER -