Heppenheimer T A <br/><br/>
Colonies in space 

 - New York  Warner Books  c1977 
 - 321p. : ill. ;18cm. 
<br/><br/> includes bibiliography and index 
<br/><br/><label>ISBN: </label>0446955590 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Space colonies