TY  - RPRT
TI  - Measuring mercury and other elemental components in tree rings
AU  - C. Gillan
AU  - W.A. Hollerman
AU  - T.W. Doyle
AU  - T.E. Lewis
PY  - 2004
UR  - https://pubs.usgs.gov/publication/70026400
ID  - 70026400
ER  -