@misc{indiciae1cb429778a69,
  title = {Ground-water pumpage in the Willamette lowland regional aquifer system, Oregon and Washington, 1990},
  author = {Charles A. Collins and Tyson M. Broad},
  year = {1996},
  doi = {10.3133/wri964111},
  url = {https://pubs.usgs.gov/publication/wri964111},
  note = {Source identifier: wri964111}
}