Stakman, E. C. 1885-1979. Principles of plant pathology / [by] E. C. Stakman [and] J. Georg e Harrar. - New York : Ronald Press Co., 1957 - xi, 581 p. : ill., maps, diagrs., tables. ; 24 cm. Includes bibliographical references. Subjects--Topical Terms: Plant diseases. Dewey Class. No.: 571.92