{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Calculating on Slide Rule and Disc","author_name":"I. J. Schuitema, H. van Herwijnen","thumbnail_url":"https://www.ebooknetworking.net/books/193/162/big1931626103.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1931626103.html\">Calculating on Slide Rule and Disc</a>","width":400,"height":300}