Mansfield,Edwin. <br/><br/>
The economics of technological change. 

 - ed. 
 - new york :  W.W NORTON,  1968. 
 - 257  p. ;    cm. 
<br/><br/>INDEX. 
<br/><br/><label>ISBN: </label> $ 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECONOMIC TECHNOLOGY.