TY  - RPRT
TI  - Elevation correction factors for E-PERM radon monitors.
AU  - P Kotrappa
AU  - L R Stieff
PY  - 1992
DO  - 10.1097/00004032-199201000-00011
UR  - https://pubmed.ncbi.nlm.nih.gov/1727416/
ID  - 1727416
ER  -