{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The half-tone process; a practical manual of photo-engraving in half-tone on zinc, copper, and brass, with a chapter on three-colour work","author_name":"Julius Verfasser","thumbnail_url":"https://www.ebooknetworking.net/books/113/003/big1130033384.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1130033384.html\">The half-tone process; a practical manual of photo-engraving in half-tone on zinc, copper, and brass, with a chapter on three-colour work</a>","width":400,"height":300}