Clay, Michael John. Performance and profitability : A manual of productivity and cost reduction techniques for industry and commerce / M. J. Clay and B. H. Walley. - London : Longmans, c1965. - xvi, 610 p. : tables ; 22 cm. - Management studies series . Includes bibliographical references and index. Subjects--Topical Terms: Costs, Industrial.Value analysis (Cost control) Dewey Class. No.: 658.1552 / CLP 1965