Acs, Zoltan J; Audretsch, D.B <br/><br/>
Patents as a measure of innovative activity 

 -  Wissenschaftszentrum, Berlin  1989 
 - 13  See WZ 330 YAM (Includes Acc. Nos. 32360 & 32361) 
<br/><br/><label>ISBN: </label>FS IV 89 - 5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECONOMICS