Chua, Simon L. Soaring 21st century mathematics grade 7 : k to 12 / Simon L. Chua [ and five others ] - Quezon City : Phoenix Publishing House , 2014 . - 595 pages : figures, tables ; 25 cm. includes bibliography ISBN: 9789710635436 Subjects--Topical Terms: Mathematics Dewey Class. No.: 512 / C47s