De Leon , Hector S. The law on obligations and contracts / - 2011, revised edition - Manila : Rex Book Store, c2011. - xxiii, 465 p. ; 22 cm. ISBN: 9789712360046 Subjects--Topical Terms: 1. Obligation (Law)-Philippines. 2. Contracts-Philippines. Dewey Class. No.: Fil. 346.07 D346l 2011