@misc{indiciae03629c387073,
  title = {Chart Presentation of Recent Work on Indicators.},
  author = {G S Walpole},
  year = {1911},
  doi = {10.1042/bj0050207},
  url = {https://pubmed.ncbi.nlm.nih.gov/16742153/},
  note = {Source identifier: 16742153}
}