{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"List of respiratory protective devices approved by the Bureau of Mines","author_name":"Schrenk, H. H.","thumbnail_url":"https://www.ebooknetworking.net/books/B00/3YC/bigB003YC2MHK.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B003YC2MHK.html\">List of respiratory protective devices approved by the Bureau of Mines</a>","width":400,"height":300}