Johnson, James <br/><br/>
A bacterial leafspot of tobacco / 
by James Johnson 
<br/><br/> Sobretiro de: Journal of Agricultural Research, 23 (6): 481-494, 1923 
<br/><br/><label>LCCN: </label>206211 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tabaco -- enfermedades