Biggs, Stephen D. <br/><br/>
A multiple source of innovation model of agricultural research and technology promotion / 
Stephen D. Biggs 
 - London :  ODI ,  1989 
 - ii, 71p. :  ill. ;  15 cm. 
 - AAU. Research and Extension Network Paper  No. 6 .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural research<br/>agricultural engineering<br/>innovations
<br/><br/><label>Gov. Doc. Class. No.: </label>GB ODI AAU NP-6