Villegas, Bernardo M. Economics : an introduction / Bernardo M. Villegas, Victor A. Abola. - 6th ed. - [s. l.] : Center for Research and Comunication Foundation, c2009. - 285 pages : illustration ; 26 cm. Includes bibliographical references and index. ISBN: 9789719178699 Subjects--Topical Terms: Economics.Philippines Economic condition. LC Class. No.: HB 171.5 V542 2009