@misc{indiciae897dcddc0904,
  title = {Programed instruction as a technique for improving spatial visualization.},
  author = {E H Brinkmann},
  year = {1966},
  doi = {10.1037/h0023068},
  url = {https://pubmed.ncbi.nlm.nih.gov/5906902/},
  note = {Source identifier: 5906902}
}