TY  - RPRT
TI  - U.S. Geological Survey toxic substances hydrology program, surface-water contamination; proceedings of the technical meeting, Denver, Colorado, February 2-4, 1987
AU  - G. E. Mallard
PY  - 1988
DO  - 10.3133/ofr87764
UR  - https://pubs.usgs.gov/publication/ofr87764
ID  - ofr87764
ER  -