{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The Prussian Calculator: By Which All Business Calculations Are Performed by One Rule ; with an Appendix","author_name":"Isaac A. Clark","thumbnail_url":"https://www.ebooknetworking.net/books/114/347/big1143474988.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1143474988.html\">The Prussian Calculator: By Which All Business Calculations Are Performed by One Rule ; with an Appendix</a>","width":400,"height":300}