Smith, Ralph E <br/><br/>
Diseases of field crops  / 
Ralph E. Smith 
 - Berkeley, Cal.  :   University of California 
 - 79 p. 
 - California Agr. Ext. Serv. Circular; 121 .
<br/><br/><label>LCCN: </label>202355 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cultivos -- Enfermedades