{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Mechanics of the girder: a treatise on bridges and roofs, in which the necessary and sufficient weight of the structure is calculated, not assumed ..","author_name":"John Davenport Crehore","thumbnail_url":"https://www.ebooknetworking.net/books/B00/AFP/bigB00AFPU848.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B00AFPU848.html\">Mechanics of the girder: a treatise on bridges and roofs, in which the necessary and sufficient weight of the structure is calculated, not assumed ..</a>","width":400,"height":300}