Edwards, A. W. F.  1935- <br/><br/>
Cogwheels of the mind:  the story of Venn diagrams/ 
A.W.F. Edwards ; foreword by Ian Stewart. 
 - Baltimore:  Johns Hopkins University Press,  2004. 
 - xvi, 110 pages:  illustrations (some color);  25 cm 
<br/><br/>Includes bibliographical references (pages 105-108) and index. 
<br/><br/> A history about who John Venn was, why he conceived of the diagram, and the properties that lie secreted beneath such a seemingly simple mathematical object. 
<br/><br/><label>ISBN: </label>0801874343 9780801874345 
<br/><br/><label>LCCN: </label>2003010633 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Venn diagrams<br/>Logic, Symbolic and mathematical.
<br/><br/><label>Dewey Class. No.: </label>511.33  / E26c