TY  - RPRT
TI  - Environmental tracers as indicators of karst conduits in groundwater in South Dakota, USA
AU  - Andrew J. Long
AU  - J.F. Sawyer
AU  - L.D. Putnam
PY  - 2007
DO  - 10.1007/s10040-007-0232-7
UR  - https://pubs.usgs.gov/publication/70031726
ID  - 70031726
ER  -