TY  - RPRT
TI  - Electron contamination from photon beam collimators.
AU  - B Nilsson
AU  - A Brahme
PY  - 1986
DO  - 10.1016/s0167-8140(86)80053-6
UR  - https://pubmed.ncbi.nlm.nih.gov/3085172/
ID  - 3085172
ER  -