Francis Watkins and the Dollond Telescope Patent Controversy Gee, Brian McConnell, edited by Anita 9781138279544 Heftet 27.02.2017 Engelsk I salg
Francis Watkins and the Dollond Telescope Patent Controversy Gee, Brian McConnell, edited by Anita 9781409466437 Innbundet 20.06.2014 Engelsk I salg