@misc{indiciae3517dab0740a,
  title = {Retention of learning in a difficult tracking task.},
  author = {M HAMMERTON},
  year = {1963},
  doi = {10.1037/h0040296},
  url = {https://pubmed.ncbi.nlm.nih.gov/13952398/},
  note = {Source identifier: 13952398}
}