Hyams, Edward . Plants in The Service of Man / Textual Documents Edward Hyams. - 1st ed / - London : J.M. Dent & Sons , 1971. - xiii, 222p. : ill ; 22cm. . Index ISBN: 0-460-03917-2 Subjects--Index Terms: Botany Plant, Service of Man Dewey Class. No.: 580 / H 997 P