TY  - RPRT
TI  - ICD coding; what's in a number?
AU  - R Williams
AU  - H King
PY  - 1989
DO  - 10.1111/j.1464-5491.1989.tb01190.x
UR  - https://pubmed.ncbi.nlm.nih.gov/2527672/
ID  - 2527672
ER  -