@misc{indiciae3261e9a3e3fc,
  title = {Shallow water table fluctuations in relation to soil penetration resistance},
  author = {James B. Shanley and K. Niclas Hjerdt and Jeffrey J. McDonnell and Carol Kendall},
  year = {2003},
  url = {https://pubs.usgs.gov/publication/70240592},
  note = {Source identifier: 70240592}
}