TY  - RPRT
TI  - A comparative study of stream water and stream sediment as geochemical exploration media in the Rio Tanama porphyry copper district, Puerto Rico
AU  - R. E. Learned
AU  - T. T. Chao
AU  - R. F. Sanzolone
PY  - 1985
DO  - 10.1016/0375-6742(85)90044-5
UR  - https://pubs.usgs.gov/publication/70012909
ID  - 70012909
ER  -