Berube David  <br/><br/>
Practical ruby gems / 
David Berube . 
 - USA :  Apress ,  2007.  
 - 271 p. : 
<br/><br/> Include index  
<br/><br/><label>ISBN: </label>9.7815905981e+012 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rubygems programs 
<br/><br/><label>LC Class. No.: </label>QA76.73  .R83B47 2007