{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Lectures On the Errors of Refraction and Their Correction with Glasses: Delivered at the New York Post-Graduate Medical School, with Illustrative Cases from Practice, Both Private and Clinical","author_name":"Francis Valk","thumbnail_url":"https://www.ebooknetworking.net/books/B00/AYJ/bigB00AYJS694.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B00AYJS694.html\">Lectures On the Errors of Refraction and Their Correction with Glasses: Delivered at the New York Post-Graduate Medical School, with Illustrative Cases from Practice, Both Private and Clinical</a>","width":400,"height":300}