title: X-ray exposure meters and automatic exposure timers.
authors.forename: L M
authors.initials: LM
authors.lastname: GARRETT
mesh_terms: D011879:Radiotherapy Dosage; D014964:X-Ray Therapy / Q000008:administration & dosage*; D014965:X-Rays / Q000295:instrumentation
keywords: ROENTGEN RAYS/apparatus; ROENTGENOTHERAPY/dosage