Swindells, Robert E. <br/><br/>
When darkness comes. 

 - New York  Morrow  1975 [c1973] 
 - 158 p.  illus.  22 cm. 
<br/><br/> A primitive band of people splits into two warring factions until the arrival of a common enemy unites them. 
<br/><br/><label>ISBN: </label>0688220169  0688320163 (lib. bdg.) 
<br/><br/><label>LCCN: </label>74017383 /AC/r86 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science fiction
<br/><br/><label>LC Class. No.: </label>PZ7.S9818  / Wh4 
<br/><br/><label>Dewey Class. No.: </label>[Fic]