TY  - RPRT
TI  - Rare-earth elements in the Permian Phosphoria formation: Paleo proxies of ocean geochemistry
AU  - D.Z. Piper
AU  - R.B. Perkins
AU  - H.D. Rowe
PY  - 2007
DO  - 10.1016/j.dsr2.2007.04.012
UR  - https://pubs.usgs.gov/publication/70031083
ID  - 70031083
ER  -