{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"First-Order Logic (Ergebnisse der Mathematik und ihrer Grenzgebiete. 2. Folge)","author_name":"Raymond R. Smullyan","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-3642867200.html\">First-Order Logic (Ergebnisse der Mathematik und ihrer Grenzgebiete. 2. Folge)</a>","width":400,"height":300}