télescope de Herschel
1976 / William Herschel's Large Twenty-Foot Telescope / J. A. Bennett / Quarterly Journal of the Royal Astronomical Society 17 (1976) p. 303 [lien]
2003 / Herschel's 40ft reflector: funding and functions / Michael Hoskin / Journal for the History of Astronomy 34 (2003) p. 1 [lien]