Wentworth, G. A.  1835-1906 <br/><br/>
Plane Geometry  [electronic resource] / 
G. A. Wentworth 
 -  Project Gutenberg,  2010 
 - Project Gutenberg  33063 .
<br/><br/> Public domain in the USA. 
<br/><br/>Electronic text 
<br/><br/><label>Subjects--Index Terms: </label>Geometry, Plane 
<br/><br/><label>LC Class. No.: </label>QA