{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"World Population Growth and Aging: Demographic Trends in the Late Twentieth Century","author_name":"Nathan Keyfitz, Wilhelm Flieger","thumbnail_url":"https://www.ebooknetworking.net/books/022/643/big0226432378.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0226432378.html\">World Population Growth and Aging: Demographic Trends in the Late Twentieth Century</a>","width":400,"height":300}