Dutch elm disease (Diapositiva) 

 - Ithaca :  Cornell University,  (s.a.) 
 - 8 diapositivas col. 2 x 2 plg. 
 - Plant disease profiles ser. 1  ; 5 .
 - Plant disease profiles ser. 1  ; 5 .
<br/><br/> Nota explicativa 5 h.  Tambien en CD 4 3/4 plgs 
<br/><br/><label>LCCN: </label>19363 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Olmo--Enfermedades.