{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Research methodology : strengthening causal interpretations of nonexperimental data : conference proceedings (SuDoc HE 20.6502:R 31/2)","author_name":"U.S. Dept of Health and Human Services","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B000104KJG.html\">Research methodology : strengthening causal interpretations of nonexperimental data : conference proceedings (SuDoc HE 20.6502:R 31/2)</a>","width":400,"height":300}