TY  - RPRT
TI  - Stanford-USGS shrimp-RG ion microprobe: A new approach to determining the distribution of trace elements in coal
AU  - A. Kolker
AU  - J. L. Wooden
AU  - H.M. Persing
AU  - R. A. Zielinski
PY  - 2000
UR  - https://pubs.usgs.gov/publication/70022481
ID  - 70022481
ER  -