title: Testing new equipment. Guest 20 fibre-optic unit. 1973.
authors.forename: P D
authors.initials: PD
authors.lastname: Gordon
mesh_terms: D003762:Dental Instruments / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D008029:Lighting / Q000266:history*; D055100:Optical Fibers / Q000266:history*