{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Challenges For The 21st Century:  Proceedings  of the World Tunnel Congress '99 Oslo, Norway 31 May - 3 June, 1999 (Volume 1 Investigations, Planning & Design, Underground Space Use, Support and Linin","author_name":"","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-9058090647.html\">Challenges For The 21st Century:  Proceedings  of the World Tunnel Congress &#039;99 Oslo, Norway 31 May - 3 June, 1999 (Volume 1 Investigations, Planning &amp; Design, Underground Space Use, Support and Linin</a>","width":400,"height":300}