New Method of Determining the General Perturbations of the Minor Planets (Classic Reprint) Ritter, William McKnight Heftet / 2018 / Engelsk
New Method of Determining the General Perturbations of the Minor Planets (Classic Reprint) Ritter, William McKnight Innbundet / 2018 / Engelsk
New Method of Determining the General Perturbations of the Minor Planets. With Numerical Example Ritter, William McKnight Heftet / 2012 / Engelsk
