@misc{indiciae79fad2134531,
  title = {The challenge of interpreting environmental tracer concentrations in fractured rock and carbonate aquifers},
  author = {Allen M. Shapiro},
  year = {2010},
  doi = {10.1007/s10040-010-0678-x},
  url = {https://pubs.usgs.gov/publication/70034222},
  note = {Source identifier: 70034222}
}