@misc{indiciae9dc6d13c2258,
  title = {36Cl: A tracer in groundwater in the aquia formation of Southern Maryland},
  author = {C.B. Purdy and A.C. Mignerey and G.R. Helz and D.D. Drummond and P.W. Kubik and D. Elmore and T. Hemmick},
  year = {1987},
  doi = {10.1016/0168-583x(87)90266-7},
  url = {https://pubs.usgs.gov/publication/70014106},
  note = {Source identifier: 70014106}
}