title: A collimating device for cobalt 60 teletherapy units.
authors.forename: H E
authors.initials: HE
authors.lastname: JOHNS
authors.forename: J A
authors.initials: JA
authors.lastname: MACKAY
mesh_terms: D003035:Cobalt; D003037:Cobalt Radioisotopes; D006801:Humans; D011851:Radioactivity; D011878:Radiotherapy / Q000295:instrumentation*
chemical_list: D003037:Cobalt Radioisotopes; D003035:Cobalt
keywords: COBALT/radioactive; RADIOTHERAPY/apparatus and instruments