Brentzel, W. E. Bacterial ring rot of the potato : investigation on possible dissemination by grasshoppers / W. E. Brentzel, and J. A. Munro - Fargo : North Dakota Agricultural College - 8 p. - North Dakota. Agr. Exp. Sta. Bull.; 295 . LCCN: 203170 Subjects--Topical Terms: Papa -- Enfermedades por bacterias Chapulines