{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Mannheim and multiplex slide rules; theory and practical application","author_name":"Leon Walter Rosenthal","thumbnail_url":"https://www.ebooknetworking.net/books/117/680/big1176802054.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1176802054.html\">Mannheim and multiplex slide rules; theory and practical application</a>","width":400,"height":300}