Ong, Anita C Elements of investment mathematics / Anita C. Ong, Presentacion B. Gabriel. - Manila : Rex Book Store, 2012. - vii, 181 p. ; 26 cm. Includes bibliographical references. ISBN: 9789712360459 Subjects--Topical Terms: Investments--Mathematics. LC Class. No.: HF5691 / .O53 2012