{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Physiological studies on the nitrogen fixing bacteria of the genus Rhizobium (Research bulletin)","author_name":"Rudger Harper Walker","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B00089NU7I.html\">Physiological studies on the nitrogen fixing bacteria of the genus Rhizobium (Research bulletin)</a>","width":400,"height":300}