@misc{indiciae2089afa5514f,
  title = {Porosity and bulk density of sedimentary rocks},
  author = {George Edward Manger},
  year = {1963},
  doi = {10.3133/b1144e},
  url = {https://pubs.usgs.gov/publication/b1144E},
  note = {Source identifier: b1144E}
}