TY  - RPRT
TI  - Signs and manual communication systems: selection, standardization, and development.
AU  - F Caccamise
AU  - R Ayers
AU  - K Finch
AU  - M Mitchell
PY  - 1978
UR  - https://pubmed.ncbi.nlm.nih.gov/747157/
ID  - 747157
ER  -