title: Chalk River beta quartz fiber electroscope.
authors.forename: R H
authors.initials: RH
authors.lastname: Thomas
mesh_terms: D004739:England; D006207:Half-Life; D049673:History, 20th Century; D009688:Nuclear Reactors / Q000266:history* / Q000295:instrumentation; D009864:Ontario; D011868:Radioisotopes
chemical_list: D011868:Radioisotopes