Brumfiel, G.W. <br/><br/>
Partially ordered rings and semi algebraic geometry 
G.W Brumfiel 
 - London  London Mathematical society 
 - Lecture note series  37 .
<br/><br/><label>Subjects--Index Terms: </label>Partially ordered rings  Semi algebraic geometry 
<br/><br/><label>Universal Decimal Class. No.: </label>512.71  / BRU