De Leon, Hector S. Textbook on the Philippine Constitution / Hector S. De Leon. - Manila : Rex Book Store, 2014. - lv, 820 p.: ill. 22 cm. English ISBN: 978-971-23-6729-8 Subjects--Topical Terms: Constitutional law--Philippines Subjects--Geographic Terms: Philippines--Constitution LC Class. No.: 342.599023 D37t c2014