Plant pathology.
Walker, John Charles, 1893-
Plant pathology. - 2d ed. - New York, McGraw-Hill, 1957. - 707 p. illus. 24 cm. - McGraw-Hill publications in the agricultural sciences .
Includes bibliographies.
56010335
Plant diseases.
Plant pathology. - 2d ed. - New York, McGraw-Hill, 1957. - 707 p. illus. 24 cm. - McGraw-Hill publications in the agricultural sciences .
Includes bibliographies.
56010335
Plant diseases.