{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Planning and Analysis of Observational Studies (Wiley Series in Probability and Statistics)","author_name":"William G. Cochran","thumbnail_url":"https://www.ebooknetworking.net/books/047/188/big0471887196.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0471887196.html\">Planning and Analysis of Observational Studies (Wiley Series in Probability and Statistics)</a>","width":400,"height":300}