@misc{indiciae8bda62fa09b9,
  title = {Self-produced programs as an alternative to purchasing audio-visual materials.},
  author = {D S Carlson},
  doi = {10.3928/0022-0124-19880301-11},
  url = {https://pubmed.ncbi.nlm.nih.gov/2450901/},
  note = {Source identifier: 2450901}
}