Mansfield, Edwin. <br/><br/>
The economics of technological change /  
Edwin Mansfield 
 - London :   Loew & Brydone (Printers) ltd,   c1968 
 - x, 257p. :   ill. ;   25 cm. 
<br/><br/>Bibliography includes 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technological innovations--United States<br/>Research, Industrial
<br/><br/><label>Dewey Class. No.: </label>338.01  / MAE 1969