Informal geometry / 
Keedy, Mervin L ...[et.al]. 
 - Menlo Park, California :  Addison-Wesley Publishing Company,  1986. 
 - x, 628 pages :  illustration ;  24 centimeter. 
<br/><br/><label>ISBN: </label>0201204495 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry. 
<br/><br/><label>Dewey Class. No.: </label>FOR 516 In3 1986