TY  - RPRT
TI  - The partitioning of copper among selected phases of geologic media of two porphyry copper districts, Puerto Rico
AU  - R. E. Learned
AU  - T. T. Chao
AU  - R. F. Sanzolone
PY  - 1981
DO  - 10.1016/0375-6742(81)90087-x
UR  - https://pubs.usgs.gov/publication/70011740
ID  - 70011740
ER  -