TY  - RPRT
TI  - Terpenoid marker compounds derived from biogenic precursors in volcanic ash from Mount St. Helens, Washington
AU  - W. E. Pereira
AU  - Colleen E. Rostad
PY  - 1983
DO  - 10.1016/0016-7037(83)90052-2
UR  - https://pubs.usgs.gov/publication/70012118
ID  - 70012118
ER  -