Plant pathology /
Walker, J. C. 1893-
Plant pathology / John Charles Walker. - 3rd ed. - New York : McGraw-Hill, c1969. - xi, 819 p. : il. - McGraw-Hill publications in the agricultural sciences .
68022770
Fitopatologia.
581.2
Plant pathology / John Charles Walker. - 3rd ed. - New York : McGraw-Hill, c1969. - xi, 819 p. : il. - McGraw-Hill publications in the agricultural sciences .
68022770
Fitopatologia.
581.2