Citation:
Wahrman Dror. 2012. &Quot;Mr. Collier&Rsquo;S Letter Racks: A Tale Of Art And Obsession At The Threshold Of The Modern Information Age&Quot;. Oxford University Press. https://www.amazon.com/Mr-Colliers-Letter-Racks-Information/dp/0199738866/ref=sr_1_fkmr0_1?s=books&ie=UTF8&qid=1513006904&sr=1-1-fkmr0&keywords=%22Mr.+Collier%E2%80%99s+Letter+Racks%3A+A+Tale+of+Art+and+Obsession+at+the+Threshold+of+the+Modern+Information.