Bochnak, Jacek, et al. <br/><br/>
Real algebraic geometry 

 -  springer  1998 
 - 430 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra and trigonometry
<br/><br/><label>Dewey Class. No.: </label>PG 512.13  BOC-R