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

 - [1st ed.] 
 -  1968 
 - x, 257 p.  illus.  25 cm. 
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technological innovations--United States.<br/>Research, Industrial--United States.
<br/><br/><label>Dewey Class. No.: </label>338.064  / M3176 Ec