{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Observational Studies (Springer Series in Statistics)","author_name":"Paul R. Rosenbaum","thumbnail_url":"https://www.ebooknetworking.net/books/144/193/big1441931910.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1441931910.html\">Observational Studies (Springer Series in Statistics)</a>","width":400,"height":300}