@misc{indiciae2becd2322fe7,
  title = {Experiences from the testing of a theory for modelling groundwater flow in heterogeneous media},
  author = {S. Christensen and R.L. Cooley},
  year = {2002},
  url = {https://pubs.usgs.gov/publication/70024481},
  note = {Source identifier: 70024481}
}