TY  - RPRT
TI  - Inter-laboratory comparison of X-ray fluorescence analyses of eruptive products of El Chichón Volcano, Chiapas, Mexico
AU  - Robert I. Tilling
AU  - Theodore J. Bornhorst
AU  - Joseph E. Taggart
AU  - William I. Rose
AU  - James J. McGee
PY  - 1987
DO  - 10.1016/0883-2927(87)90049-7
UR  - https://pubs.usgs.gov/publication/70014594
ID  - 70014594
ER  -