{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The slide-ruler's guide;: Being a practical treatise on the use of the artificer's common slide rule","author_name":"George Oakley Lucas","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B000888ETI.html\">The slide-ruler&#039;s guide;: Being a practical treatise on the use of the artificer&#039;s common slide rule</a>","width":400,"height":300}