TY  - RPRT
TI  - Selectivity and effectiveness of extractants used to release metals associated with organic matter
AU  - C. S.E. Papp
AU  - L.H. Filipek
AU  - K. S. Smith
PY  - 1991
DO  - 10.1016/0883-2927(91)90010-m
UR  - https://pubs.usgs.gov/publication/70016510
ID  - 70016510
ER  -