Project Gutenberg 2022-12-18 Public domain in the USA. 169 Einstein, Albert 1879 1955 Fundamental ideas and problems of the theory of relativity $aSweden :$bNobel Foundation,$c1923. Laura Natal Rodrigues (Images generously made available by the Nobel Foundation.) https://www.nobelprize.org/prizes/physics/1921/einstein/lecture/ 20221216023346einstein 1923 SE en Relativity (Physics) QC Text 56468 2025-06-27T11:38:08.391956 text/html 54812 2022-12-18T08:15:11 text/html 220996 2025-06-27T11:38:10.353991 application/epub+zip 219498 2025-06-27T11:38:08.933950 application/epub+zip 80094 2025-06-27T11:38:08.664963 application/epub+zip 235233 2025-06-27T11:38:11.717959 application/x-mobipocket-ebook 218489 2025-06-27T11:38:10.139943 application/x-mobipocket-ebook 12649 2025-06-27T11:38:11.837929 application/rdf+xml 15734 2025-06-27T11:38:08.791981 image/jpeg 2738 2025-06-27T11:38:08.726960 image/jpeg 176490 2022-12-18T08:19:20 application/octet-stream application/zip 186296 2025-06-27T11:38:08.431948 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