Higgins, J. C. (John Christopher). Strategic and operational planning systems : principles and practice / J. C. Higgins. - Englewood Cliffs, N.J.: Prentice-Hall International , 1980. - 257p. : ill. ; 24 cm. Includes index. Includes bibliographies. ISBN: 0138511969 24.95 Subjects--Topical Terms: Corporate planning.