@misc{indiciaed4b3e275275e,
  title = {An operational approach to developmental planning.},
  author = {A Waterston},
  year = {1971},
  doi = {10.2190/t31g-a6wc-3tx5-dcwx},
  url = {https://pubmed.ncbi.nlm.nih.gov/5136229/},
  note = {Source identifier: 5136229}
}