TY  - RPRT
TI  - Radiological subtraction by colour addition.
AU  - B F Vaughan
PY  - 1968
DO  - 10.1111/j.1440-1673.1968.tb03365.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5662536/
ID  - 5662536
ER  -