Project Gutenberg 2025-02-05 Public domain in the USA. 116 Valkenstein, Kees 1862 1952 De verdwijn-machine $aUtrecht :$bW. de Haan, $c1917. Met illustraties van den schrijver. Jeroen Hellingman, Dwight Decker and the Online Distributed Proofreading Team at https://www.pgdp.net/ for Project Gutenberg 20240203021721valkenstei 1917 NL nl Science fiction Inventions -- Juvenile fiction Crime -- Juvenile fiction PZ Text 436703 2025-02-05T20:00:41.898930 text/html 404187 2025-02-05T19:07:33 text/html 1366142 2025-02-05T20:01:07.202758 application/epub+zip 1365309 2025-02-05T20:00:53.769872 application/epub+zip 264937 2025-02-05T20:00:45.697875 application/epub+zip 2619247 2025-02-05T20:01:16.502804 application/x-mobipocket-ebook 2586091 2025-02-05T20:01:04.119803 application/x-mobipocket-ebook 357265 2025-02-05T20:00:40.537975 text/plain; charset=us-ascii 337452 2025-02-05T19:07:33 text/plain; charset=us-ascii 3994 2025-02-05T20:01:16.643761 application/rdf+xml 24587 2025-02-05T20:00:50.700838 image/jpeg 3537 2025-02-05T20:00:50.613850 image/jpeg 1902052 2025-02-05T20:00:41.963907 application/octet-stream application/zip 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