Borror, Donald Joyce, 1907- An introduction to the study of insects / Donald J. Borror, Charles A. Triplehorn, Norman F. Johnson. - 6th ed. - Philadelphia : Saunders College Pub., c1989. - xiv, 875 p. : ill. ISBN: 0030253977 LCCN: 91034078 Subjects--Topical Terms: Entomology.Insects--United States.