@misc{indiciae4d11c406f2b2,
  title = {Conceptual model directions.},
  author = {A L Whall},
  year = {1987},
  doi = {10.3928/0098-9134-19870901-03},
  url = {https://pubmed.ncbi.nlm.nih.gov/3650282/},
  note = {Source identifier: 3650282}
}