Walker, J. C. Plant pathology / John Charles Walker. - 3rd edition. - New York : McGraw-Hill, c1969. - xi, 819 pages : Illustrations ; 23 cm. - McGraw-Hill publications in the agricultural sciences . Includes bibliographical references. Includes bibliographies. Subjects--Topical Terms: Plant diseases. LC Class. No.: SB731 / .W235 1969 Dewey Class. No.: 581.2