Poenaru Valentin <br/><br/>
Groupes discretes 
Poenaru Valentin 
 - Berlin  Springer-Verlag           1974 
 - 216p.  cm. 
 - Lecture Notes in Mathematics; 421 .
<br/><br/><label>Standard No.: </label>20031 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B27, 122L4