Abelson, Harold <br/><br/>
Turtle geometry  the computer as a medium for exploring mathematics 
Harold Abelson, Andrea A. diSessa 
 - Cambridge, Mass.  MIT Press  c1981 
 - xx, 477 p.  ill.  24 cm 
 - The MIT Press series in artificial intelligence .
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry--Study and teaching<br/>Computer-assisted instruction
<br/><br/><label>Dewey Class. No.: </label>516  / .007  / 8