title: Useful contact.
authors: A
authors: A
authors: Somerville
mesh_terms: D003748:Dental Equipment; D006801:Humans; D011861:Radiography, Dental / Q000295:instrumentation* / Q000379:methods; D014962:X-Ray Film / Q000600:supply & distribution*; D014963:X-Ray Intensifying Screens / Q000600:supply & distribution*