Edge W L <br/><br/>
Theory of ruled surfaces 

 -  1951 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>39330 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Geometry<br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>B6391:25, G1