Three Copernican treatises [electronic resource] : the Commentariolus of Copernicus, the Letter against Werner, the Narratio prima of Rheticus / translated with introduction and notes by Edward Rosen.
Electronic text and image data. Ann Arbor, Mich. : University of Michigan, Michigan Publishing, 2008. Includes both TIFF files and keyword searchable text. ([ACLS Humanities E-Book]) Mode of access: Intranet.