@misc{indiciae61f2c036f19b,
  title = {Multiple-methods investigation of recharge at a humid-region fractured rock site, Pennsylvania, USA},
  author = {C.S. Heppner and J. R. Nimmo and G.J. Folmar and W.J. Gburek and D. W. Risser},
  year = {2007},
  doi = {10.1007/s10040-006-0149-6},
  url = {https://pubs.usgs.gov/publication/70030788},
  note = {Source identifier: 70030788}
}