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![Unknown Quantity: A Real and Imaginary History of Algebra by Derbyshire, John unknown Edition [Paperback(2007)]](https://m.media-amazon.com/images/I/41bPMPxYq8L._AC_UY218_.jpg)
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Unknown Quantity: Vincent Charles Perini Jr.'s Role in Oil and Uranium in the American West, 1953-58
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![[ The Unknown Quantity [ THE UNKNOWN QUANTITY ] By Broch, Hermann ( Author )Dec-27-2000 Paperback](https://m.media-amazon.com/images/I/411-XRPY41L._AC_UY218_.jpg)
The Unknown Quantity
by Edgar Oakes Achorn | Aug 12, 2015
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The Quantity Media Podcast
by Quantity Media
