TY - BOOK AU - Berkeley, M. J. TI - Observations, botanical and physiological, on the potato murrain T2 - Phytopathological classics U1 - 635.21 PY - 1948/// CY - East Lansing PB - American Phytopathological Society KW - Papas KW - Enfermedades KW - Phytophthora infestans ER -