Project Gutenberg 2004-10-10 Public domain in the USA. 176 Manning, Henry Parker 1859 1956 Non-Euclidean Geometry en Geometry, Non-Euclidean QA Text Mathematics 771222 2004-10-10T19:30:08 application/pdf 8795 2025-08-06T06:42:24.696219 application/rdf+xml 160131 2020-12-18T10:42:56 application/prs.tex 13790 2025-08-06T06:42:24.628232 image/jpeg 3818 2025-08-06T06:42:24.337241 image/jpeg 665265 2004-10-10T19:30:08 application/octet-stream application/zip 399821 2004-10-10T19:30:08 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