Del mal del segno 
by Agostino Bassi 
 - (sl)  American Phytopathological Society  1958 
 - xii, 49 p. ; 24cm 
 - Phytopathological classics .
<br/><br/><label>ISBN: </label>X920047414 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Silkworms--Diseases