O'Neill, Gerard K. <br/><br/>
The high frontier:  human colonies in space/ 
Gerard K. O'Neill 
 - London:  Jonathan Cape,  1977 
 - 288 p.:  plates;  23 cm. 
<br/><br/> Includes index 
<br/><br/>Bibliographical references: p. 276-282 
<br/><br/><label>ISBN: </label>0224014064  £ 5.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Space colonies<br/>Space stations<br/>Astronautics and civilization
<br/><br/><label>Dewey Class. No.: </label>629.442