@misc{indiciae1e7de37a52aa,
  title = {A versatile and inexpensive planimeter system.},
  author = {P C Brunjes},
  year = {1983},
  doi = {10.1016/0165-0270(83)90056-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/6688281/},
  note = {Source identifier: 6688281}
}