TY  - RPRT
TI  - Provenience of pyroclastic materials
AU  - C. S. Ross
PY  - 1955
DO  - 10.1130/0016-7606(1955)66[427:popm]2.0.co;2
UR  - https://pubs.usgs.gov/publication/70206678
ID  - 70206678
ER  -