TY  - RPRT
TI  - Determination of half-value layer.
AU  - E D TROUT
AU  - J P KELLEY
AU  - A C LUCAS
PY  - 1959
DO  - 10.1148/73.1.107b
UR  - https://pubmed.ncbi.nlm.nih.gov/13668113/
ID  - 13668113
ER  -