TY  - RPRT
TI  - Mixing of shallow and deep groundwater as indicated by the chemistry and age of karstic springs
AU  - D. J. Toth
AU  - B. G. Katz
PY  - 2006
DO  - 10.1007/s10040-005-0478-x
UR  - https://pubs.usgs.gov/publication/70031022
ID  - 70031022
ER  -