@misc{indiciaeaaa509035f24,
  title = {Shaping performance on programmed materials.},
  author = {M L Berman},
  year = {1967},
  doi = {10.2466/pr0.1967.21.1.29},
  url = {https://pubmed.ncbi.nlm.nih.gov/6078382/},
  note = {Source identifier: 6078382}
}