@misc{indiciae56843434c03a,
  title = {Students' time on learning tasks in special education.},
  author = {H L Rich and S M Ross},
  year = {1989},
  doi = {10.1177/001440298905500604},
  url = {https://pubmed.ncbi.nlm.nih.gov/2703013/},
  note = {Source identifier: 2703013}
}