Clarke, L. Harwood Ordinary level mathematics / L. Harwood Clarke - 7th ed. - U.S.A.: Heinemann, c 1984. - xvi, 503p.: ill.;, figs.;, tables.;, maps.; 21 cm. Includes index. Dept. of CSE Subjects--Topical Terms: Approximations Dewey Class. No.: 510 / CLO