TY  - RPRT
TI  - Factors affecting x-ray spectra.
AU  - E L Nickoloff
AU  - H L Berman
PY  - 1993
DO  - 10.1148/radiographics.13.6.8290728
UR  - https://pubmed.ncbi.nlm.nih.gov/8290728/
ID  - 8290728
ER  -