@misc{indiciae08e4941722fb,
  title = {Categorical and programming changes in special education services.},
  author = {D W Halgren and H F Clarizio},
  year = {1993},
  doi = {10.1177/001440299305900607},
  url = {https://pubmed.ncbi.nlm.nih.gov/8519268/},
  note = {Source identifier: 8519268}
}