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Wiest J D, . (1969). Management guide to PERT/CPM. New Jersey: New Jersey, Prentice-Hall.
Wiest J D, . 1969. Management guide to PERT/CPM. New Jersey: New Jersey, Prentice-Hall.
Wiest J D, . Management guide to PERT/CPM. New Jersey: New Jersey, Prentice-Hall. 1969.