TY  - RPRT
TI  - An improved safety system.
AU  - W J Hartin
AU  - L J Goodman
PY  - 1971
DO  - 10.1097/00004032-197101000-00008
UR  - https://pubmed.ncbi.nlm.nih.gov/5559155/
ID  - 5559155
ER  -