Helmer-Hirschberg, Olaf. <br/><br/>
Looking forward :  a guide to futures research / 
Olaf Helmer. 
 - Beverly Hills, Calif. :  Sage Publications,  c1983. 
 - 376 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0803920172 
<br/><br/><label>LCCN: </label>83004520  
<br/><br/><label>LC Class. No.: </label>CB 158 .H415 1983  / .H415 1983 
<br/><br/><label>Dewey Class. No.: </label>003/.2