title: Calibration frequency of DAP meters.
authors.forename: J S
authors.initials: JS
authors.lastname: Nettleton
authors.forename: J R
authors.initials: JR
authors.lastname: Gill
mesh_terms: D002138:Calibration / Q000592:standards; D006283:Health Physics / Q000592:standards*; D006801:Humans; D011872:Radiology Department, Hospital; D011874:Radiometry / Q000295:instrumentation*; D006113:United Kingdom