Ayres, Robert. <br/><br/>
Technological forecasting and long - range planning. 

 - London ;   New York :   McGraw-hill,   1969. 
 - 237 p. :   il. ;   24 cm. 
<br/><br/><br/>Espaņol. 
<br/><br/><label>Dewey Class. No.: </label>600