Potato virus diseases (leaflet 139 replaces AL 139) 

 - Replaces AL 139 /revised 1979 
 -  HMSO, Edinburgh,  1971 
 - ADAS Leaflet  139 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant health<br/>Potatoes<br/>Potato diseases
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>Potato growing, potato marketing, potatoes, seed potatoes