Gardner, Martin, <br/><br/>
Aha! Aha! insight / 
Martin Gardner ; [framed drawings by Jim Glen, diagrs. by Felix Cooper]. 
 - New York :  Scientific American,  c1978. 
 - viii, 179 p. :  ill. ; 
<br/><br/><label>ISBN: </label>0894540017 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical recreations.<br/>Puzzles.<br/>Problem solving.
<br/><br/><label>LC Class. No.: </label>QA95 G23. 1978