TY  - RPRT
TI  - Chemistry of the subalkalic silicic obsidians
AU  - Ray MacDonald
AU  - Robert L. Smith
AU  - John E. Thomas
PY  - 1992
DO  - 10.3133/pp1523
UR  - https://pubs.usgs.gov/publication/pp1523
ID  - pp1523
ER  -