Schumann, Gail L. Plant diseases their biology and social impact Gail L. Schumann. - St. Paul, Minn. APS Press, American Phytopathological Society c1991. - viii, 397 p. ill. 24 cm. Includes bibliographical references and index. ISBN: 0890541167 LCCN: 91070960 Subjects--Topical Terms: Plant diseasesPlant diseases--Social aspects. LC Class. No.: SB731 / .S38 1991 Dewey Class. No.: 632.3 / S3926p National Agricultural Library Call No.: SB731.S38