{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Some factors affecting and suggested ways for improving coal-mine ventilation, with particular reference to mines in Illinois, Indiana, and Western Kentucky","author_name":"C. A. Herbert","thumbnail_url":"https://www.ebooknetworking.net/books/B00/3HK/bigB003HKQQXK.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B003HKQQXK.html\">Some factors affecting and suggested ways for improving coal-mine ventilation, with particular reference to mines in Illinois, Indiana, and Western Kentucky</a>","width":400,"height":300}