{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Sextants at Greenwich: A Catalogue of the Mariner's Quadrants, Mariner's Astrolabes, Cross-staffs, Backstaffs, Octants, Sextants, Quintants, ... in the National Maritime Museum, Greenwich.","author_name":"W.F.J. Mörzer Bruyns, Richard Dunn","thumbnail_url":"https://www.ebooknetworking.net/books/019/953/big0199532540.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0199532540.html\">Sextants at Greenwich: A Catalogue of the Mariner&#039;s Quadrants, Mariner&#039;s Astrolabes, Cross-staffs, Backstaffs, Octants, Sextants, Quintants, ... in the National Maritime Museum, Greenwich.</a>","width":400,"height":300}