Ungson, Olivia B. Chemistry: science, environment, technology, and society / Olivia B. Ungson and Virginia Ramos-Fornias - Quezon City Sibs Publishing House, Inc. c2010. - 437 p. ISBN: 978-971-791-804-4 Subjects--Topical Terms: Chemistry. Dewey Class. No.: Res 540 Un311 2010