{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Zur krise der lichtäther-hypothese: rede gehalten beim antritt des lehramts an der Reichsuniversität zu Leiden (German Edition)","author_name":"Paul Ehrenfest","thumbnail_url":"https://www.ebooknetworking.net/books/B00/41I/bigB0041IXSEM.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0041IXSEM.html\">Zur krise der lichtäther-hypothese: rede gehalten beim antritt des lehramts an der Reichsuniversität zu Leiden (German Edition)</a>","width":400,"height":300}