Black, John Essential mathematics for economists / J. Black, J. F. Bradley. - 2d ed. - Chichester [Eng.] ; New York : J. Wiley, c1980. - x, 316 p. : ill. ; 24 cm. Includes index. eng ISBN: 9780471276609 TZS18,709.60 Subjects--Topical Terms: Economics, Mathematical. Dewey Class. No.: 510.2433 BLA