Study of the extension of plant protection measure 

 - Delhi  Manager of Publicaitons India         1968 
 - ii, 157p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil  Industry
<br/><br/><label>Dewey Class. No.: </label>X9(J:4:6).2.N68, K8