@misc{indiciae145c3a568170,
  title = {Magnetic fields for a 4x6 prismatic model},
  author = {Gordon E. Andreasen and Isidore Zietz},
  year = {1969},
  doi = {10.3133/pp666},
  url = {https://pubs.usgs.gov/publication/pp666},
  note = {Source identifier: pp666}
}