@misc{indiciae243226f6ef6a,
  title = {Piezometers for pore-pressure measurements in fine-textured soils},
  author = {A.I. Johnson},
  year = {1965},
  doi = {10.3133/ofr6583},
  url = {https://pubs.usgs.gov/publication/ofr6583},
  note = {Source identifier: ofr6583}
}