Kaya Rustem <br/><br/>
Rings and geometry . 

 -  1985 
 - Nato asi series C:Mathematical and physical  sciences  160 .
<br/><br/><label>Standard No.: </label>6830 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B262, M5