@misc{indiciaea5be70b4dd8f,
  title = {Two years' experience of programmed teaching. 2. Branching programmes.},
  author = {E J Hull and B J Isaacs},
  year = {1966},
  url = {https://pubmed.ncbi.nlm.nih.gov/5905693/},
  note = {Source identifier: 5905693}
}