Diaz, Zenaida B. , Next century mathematics : the new grade 9 / Zenaida B. Diaz, (and five others). - Quezon City: Phoenix Publishing House, Inc. , 2014. - ix, 557 pages : illustrations, figures, tables and graphs; 25 cm. - . includes appendix, glossary and index. English ISBN: 9789710635481 Subjects--Topical Terms: Century mathematics. Math for secondary schools. Dewey Class. No.: 510 / Or47n