Halstead, Maurice H. 1918- Elements of software science / Maurice H. Halstead. - New York : Elsevier, c1977. - xiv, 127 p. : graphs ; 24 cm. - Operating and programming systems series ; 2 . "Elsevier computer science library." Includes index. Bibliography: p. 120-124. ISBN: 0444002057 0444002154 Subjects--Topical Terms: Computer software.