Rontgen Rays Memoirs by Rontgen, Stokes, and J. J. Thomson Barker, George Frederick Innbundet / 2015 / Engelsk
Memoir of John William Draper, 1811-1882 (Classic Reprint) Barker, George Frederick Heftet / 2018 / Engelsk
Text-Book of Elementary Chemistry: Theoretical and Inorganic (Classic Reprint) Barker, George Frederick Heftet / 2018 / Engelsk
Text-Book of Elementary Chemistry: Theoretical and Inorganic (Classic Reprint) Barker, George Frederick Innbundet / 2018 / Engelsk
Memoir of John William Draper, 1811-1882 (Classic Reprint) Barker, George Frederick Innbundet / 2018 / Engelsk
Text-Book of Elementary Chemistry, Theoretical and Inorganic Barker, George Frederick Innbundet / 2015 / Engelsk