@misc{indiciae33c525490c97,
  title = {U. S. G. S. MODULAR GROUND-WATER FLOW MODEL: DESIGNED TO BE UNDERSTOOD AND ADAPTED.},
  author = {Michael G. McDonald and Arlen W. Harbaugh},
  year = {1985},
  url = {https://pubs.usgs.gov/publication/70013336},
  note = {Source identifier: 70013336}
}