Jerome L. Salazar. Phoenix Math for the 21st Century Learners/ Jerome L. Salazar, [and three others]. - Quezon city : Phoenix Publishing House, Inc., 2017. - xxvi, 431 pages : Tables, illustrations, firgures ; 26cm.+ 1 Compact Disk English ISBN: 9789710643714 Subjects--Topical Terms: Dewey Class. No.: 510 / Sa161p