Hippel, Eric von. <br/><br/>
The sources of innovation / 
Eric von Hippel. 
 - New York :  Oxford University Press,  c1988. 
 - xi, 218 p. :  ill. ; 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0195040856 (alk. paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technological innovations--Economic aspects.
<br/><br/><label>LC Class. No.: </label>HC79.T4  / H56 1988 
<br/><br/><label>Dewey Class. No.: </label>338/.06