Dalmas, John. <br/><br/>
The Helverti invasion/ 
John Dalmas. 
 - N.Y. :  Baen Books :  2003. 
 - 492 p. ;  18 cm. 
<br/><br/><label>ISBN: </label>0743471695 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science fiction, American<br/>Bilim kurgu, Amerikan.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Science fiction.
<br/><br/><label>LC Class. No.: </label>PS3554.A46