Plant health  : the scientific basis for administrative control of plant diseseases and pests 

 - Oxford:  Blackwell,  1979. 
 - 322p 
<br/><br/><br/>eng 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant diseaeses
<br/><br/><label>Dewey Class. No.: </label>632  / PLA