Lockyer, K. G. Critical path analysis and other project network techniques / Keith Lockyer. - 4th ed. - London ; Marshfield, Mass. : Pitman, 1984. - xii, 260 p. : ill. ; 23 cm. Rev. ed. of: An introduction to critical path analysis. 3rd ed. 1969. Includes index. Bibliography: p. 245-248. ISBN: 0273019511 (pbk.) : Subjects--Topical Terms: Critical path analysis. Dewey Class. No.: 658.404 / KEC 1984