Sill, Webster H. <br/><br/>
The Plant protection discipline problems and possible developmental strategies  Webster H. Sill. 

 - Montelair [N.J.] Allanheld  Osmun and Co.  1978 
 - x, 190p., illus. 
<br/><br/><label>ISBN: </label>0-470-26443-8. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant protection Plant disease.
<br/><br/><label>Dewey Class. No.: </label>632,  / S45P