Geometry the easy way /  
Leff Lawrence S. 
 - 2nd ed. 
 - New York :   Barrons's Educational Series ,  1990 
 - vi ,362 p. ;  ill.  28 cm 
<br/><br/><label>ISBN: </label>0812042875 
<br/><br/><label>LC Class. No.: </label>QA455  / .L43  1990