{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Nomographs for calculating the second derivatives of the force of gravity potential obtained by observations made with a torsion balance at five azimuths","author_name":"A. Stepanoff","thumbnail_url":"https://www.ebooknetworking.net/books/B00/41K/bigB0041KJK2Y.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0041KJK2Y.html\">Nomographs for calculating the second derivatives of the force of gravity potential obtained by observations made with a torsion balance at five azimuths</a>","width":400,"height":300}