Thomas, R. L. 1942- Using mathematics in economics / R.L. Thomas. - 2nd ed. - Harlow : Financial Times, 1999. - xxxix, 341 p. : ill. ; 24 cm. Includes bibliographical references and index ISBN: 0201360500 / RM172.81 LCCN: 98-049112 Subjects--Topical Terms: Economics--Graphic methods.