@misc{indiciae9474a325e6f3,
  title = {Petrophysics of low-permeability medina sandstone, northwestern Pennsylvania, Appalachian Basin},
  author = {J.W. Castle and A.P. Byrnes},
  year = {1998},
  url = {https://pubs.usgs.gov/publication/70020449},
  note = {Source identifier: 70020449}
}