{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Respiratory protective devices approved by the Bureau of Mines as of October 1, 1965","author_name":"Robert H. Schutz","thumbnail_url":"https://www.ebooknetworking.net/books/B00/3HK/bigB003HKQJNW.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B003HKQJNW.html\">Respiratory protective devices approved by the Bureau of Mines as of October 1, 1965</a>","width":400,"height":300}