Fox, Alan. The time-span of discretion theory: an appraisal. - London, Institute of Personnel Management, 1966. Bibliography: p. 29-30. LCCN: 67071338 Nat. Bib. No.: B67-95 Subjects--Topical Terms: Wages.Job evaluation.Responsibility. LC Class. No.: HD4909 / .F67 Dewey Class. No.: 331.215