@misc{indiciae43451c2af440,
  title = {Conceptual approaches and issues.},
  author = {M J Marr},
  year = {1984},
  doi = {10.1901/jeab.1984.42-353},
  url = {https://pubmed.ncbi.nlm.nih.gov/16812394/},
  note = {Source identifier: 16812394}
}