{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Slide Rules : Their History, Models, And Makers","author_name":"Peter M. Hopp","thumbnail_url":"https://www.ebooknetworking.net/books/187/933/big1879335867.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1879335867.html\">Slide Rules : Their History, Models, And Makers</a>","width":400,"height":300}