@misc{indiciae89010e6b030c,
  title = {Signs and manual communication systems: selection, standardization, and development.},
  author = {F Caccamise and R Ayers and K Finch and M Mitchell},
  year = {1978},
  url = {https://pubmed.ncbi.nlm.nih.gov/747157/},
  note = {Source identifier: 747157}
}