De Leon, Hector S. Philippine constitutional law : principles and cases : volume 1 / Hector S. De Leon, Hector M. De Leon, Jr. - Manila : Rex Book Store, 2017. - xlii, 1138 pages ; 23 centimeter. Includes bibliographies. ISBN: 9789712386794 Subjects--Topical Terms: Constitutional law--Philippines. Dewey Class. No.: LAW 342.59902 D37p 2017 vol.1