@misc{indiciaec334e0e37154,
  title = {Learning system design.},
  author = {C B Maclean and S J Knaggs and H E Andrews and D D Spilker},
  year = {1976},
  url = {https://pubmed.ncbi.nlm.nih.gov/1045966/},
  note = {Source identifier: 1045966}
}