Repertory of Arts and Manufactures
Reference: Barker, 1796
Robert Barker, 'Specification of the Patent granted to Mr. ROBERT BARKER … for his Invention of an entire new Contrivance or Apparatus, called by him “La Nature à Coup d’Oeil”, for the Purpose of displaying Views of Nature at large', Repertory of Arts and Manufactures, vol.4, 1796, pp.165–67