Sespene, Elucila M. <br/><br/>
A Class of intersection graph of half-lines and of line segments in the plane 
Elucila M. Sespene 
 - Manila  De La Salle University  2009. 
<br/><br/>Mathematics 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Mathematics
<br/><br/><label>LC Class. No.: </label>CD-00482t