TY  - RPRT
TI  - A multiple-diaphragm system for a cesium 137 unit.
AU  - R S LANDAUER
PY  - 1962
DO  - 10.1148/78.2.256
UR  - https://pubmed.ncbi.nlm.nih.gov/14461953/
ID  - 14461953
ER  -