@misc{indiciaee26c21c3d73e,
  title = {Learner attitudes as a variable in the use of programmed material.},
  author = {D W Podshadley and M K Chen and R John and P A Ratcliff},
  year = {1968},
  url = {https://pubmed.ncbi.nlm.nih.gov/5247055/},
  note = {Source identifier: 5247055}
}