Archives containing the RDF files for *all* our books can be downloaded at https://www.gutenberg.org/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog Project Gutenberg 2014-11-22 Public domain in the USA. 68 Bohr, Niels 1885 1962 Bohr, N. (Niels) Bohr, Niels Henrik David On the Quantum Theory of Line-Spectra, Part 1 and 2 en Quantum theory Spectrum analysis QC Text Physics Browsing: Science - Physics Browsing: Science - General 766804 2014-11-22T08:22:04 application/pdf 424334 2021-06-11T17:21:37 application/prs.tex 112368 2021-06-11T17:21:37 application/prs.tex application/zip 9991 2024-11-19T15:37:53.510945 application/rdf+xml 16182 2024-11-19T15:37:53.439964 image/jpeg 3667 2024-11-19T15:37:53.167947 image/jpeg 748668 2014-11-22T08:22:04 application/octet-stream application/zip en.wikipedia