{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Index Numbers in Economic Theory and Practice","author_name":"R. G. D. Allen","thumbnail_url":"https://www.ebooknetworking.net/books/020/236/big020236254X.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-020236254X.html\">Index Numbers in Economic Theory and Practice</a>","width":400,"height":300}