Lockyer, K. G. An introduction to critical path analysis [by] K. G. Lockyer. - 2nd ed. - London, Pitman, 1967. Bibliography: p. 123-126. LCCN: 67085109 Nat. Bib. No.: B67-7511 Subjects--Topical Terms: Critical path analysis. LC Class. No.: HD69.P7 / L6 1967 Dewey Class. No.: 658.5/1