{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"100 Years of Telephone Switching: Manual and Electromechanical Switching, 1878-1960's (Pt. 1)","author_name":"Robert J. Chapuis, Amos E. Joel","thumbnail_url":"https://www.ebooknetworking.net/books/158/603/big1586033492.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1586033492.html\">100 Years of Telephone Switching: Manual and Electromechanical Switching, 1878-1960&#039;s (Pt. 1)</a>","width":400,"height":300}