Laigo, Glenn R. <br/><br/>
On tetrahedron groups and their subgroups 
Glenn R. Laigo 
 - Quezon City  Ateneo de Manila University - Loyola Schools  2008. 
<br/><br/>Mathematics 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Mathematics
<br/><br/><label>LC Class. No.: </label>CD-00055t