Keywords: Rheticus.png en Frontpage of Rheticus's book Canon Doctrinae Triangulorum 1551 ca Portada del Canon Doctrinae Triangulorum de Rheticus 1551 1551 books google com Georg Joachim Rheticus 1514-1574 File Rheticus Canon doctrinae triangulorum jpg Custom license marker 2013 10 26 PD-old-100 Uploaded with UploadWizard Mathematics books book covers single pages etc 1551 books Georg Joachim Rheticus |