Heinlein, Robert A.   frey50        <br/><br/>
Tunnel in the sky 

 - New York  Ballantine  1955 
 - 214p.   
<br/><br/> Summary:  Rod Walker didn't know where in the universe he'd been sent...he only knew he somehow had to survive.  
<br/><br/><label>ISBN: </label>0-345-35373-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science Fiction