Redognition and control of pests and diseases of farm crops  / 
by Ernst Gram -et. al.- 
 - London  :   Blandford Press 
 - 166 p. 
<br/><br/><label>LCCN: </label>206551 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Control de plagas<br/>Cultivos -- Enfermedades <br/>Cultivos -- plagas <br/>Fitopatología 
<br/><br/><label>Dewey Class. No.: </label>PA 632 R44 1980