Unit 3    non-euclidean geometry 

 - Keynes  The open university  1980 
 - 67p.  30cm. 
<br/><br/><label>ISBN: </label>0749247843 
<br/><br/><label>Subjects--Topical Terms: </label><br/>NON-EUCLIDEAN GEOMETRIES<br/>GEOMETRY
<br/><br/><label>Dewey Class. No.: </label>516.9  / OPE