@misc{indiciaeaddaa1f532bb,
  title = {LEARNING BY PROGRAMED AND TEXT FORMAT AT THREE LEVELS OF DIFFICULTY.},
  author = {M E FELDMAN},
  year = {1965},
  doi = {10.1037/h0022153},
  url = {https://pubmed.ncbi.nlm.nih.gov/14327686/},
  note = {Source identifier: 14327686}
}