title: Routine calibration of automatic exposure control systems for diagnostic x-ray machines: a 5-y progress report.
authors.affiliation: Radiology Department, Hospital of the University of Pennsylvania, Philadelphia 19104.
authors.forename: J
authors.initials: J
authors.lastname: Hale
mesh_terms: D009784:Occupational Diseases / Q000517:prevention & control; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods*; D011859:Radiography / Q000295:instrumentation* / Q000592:standards