Project Gutenberg 2010-09-07 Public domain in the USA. 194 Planck, Max 1858 1947 Planck, Max Karl Ernst Ludwig Clarke, Hans Thacher 1887 1972 Clarke, H. T. (Hans Thacher) Silberstein, Ludwik 1872 1948 Silberstein, L. (Ludwik) 22016921 The Origin and Development of the Quantum Theory en Quantum theory QC Text Browsing: Science - Physics Browsing: Science - General 325386 2010-09-07T07:30:45 application/pdf 307349 2010-09-07T07:30:45 application/pdf application/zip 75376 2010-09-07T07:30:45 application/prs.tex 25467 2010-09-07T07:30:45 application/prs.tex application/zip 10235 2024-09-14T08:17:34.869900 application/rdf+xml 16819 2024-09-14T08:17:34.787891 image/jpeg 3679 2024-09-14T08:17:34.618868 image/jpeg 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