Bonsen, K. J. M. <br/><br/>
Barrier zone formation as a resistance mechanisms of elms to dutch elm disease 

<br/><br/> Sobretiro de : IAWA. Bulletin N.S. : 6 (1): 71-77, 1985 
<br/><br/><label>LCCN: </label>67106 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Olmo--Enfermedades.