Sawyer, Walter Warwick  1911- <br/><br/>
Prelude to mathematics 

 - Baltimore :   Penguin Books,   1963 
 - 213 p.  18 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GEOMETRIA PROYECTIVA<br/>GEOMETRIA NO EUCLIDIANA<br/>MATEMATICAS
<br/><br/><label>Universal Decimal Class. No.: </label>510/514