Sill Webster H <br/><br/>
Plant protection discipline: Problems and possible developmental statistics 

 -  1978 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>53162 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Plant disease<br/> Plant protection<br/>Agriculture
<br/><br/><label>Dewey Class. No.: </label>J:4:5, L8;1