Project Gutenberg 2006-11-12 Public domain in the USA. 776 Todhunter, I. (Isaac) 1820 1884 Todhunter, Isaac Spherical Trigonometry: For the Use of Colleges and Schools en Spherical trigonometry QA Text Mathematics 828992 2020-08-21T12:00:34 application/pdf 9736 2025-07-08T10:31:52.777056 application/rdf+xml 373710 2020-08-21T12:00:34 application/prs.tex 20860 2025-07-08T10:31:52.717102 image/jpeg 4548 2025-07-08T10:31:52.478068 image/jpeg 806553 2020-08-21T12:00:34 application/octet-stream application/zip 260316 2020-08-21T12:00:34 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog en.wikipedia