TY  - RPRT
TI  - Graphic mnemonic for variable decelerations.
AU  - A Chao
PY  - 1990
DO  - 10.1016/0002-9378(90)91151-2
UR  - https://pubmed.ncbi.nlm.nih.gov/2403142/
ID  - 2403142
ER  -