Villegas, Arturo N.-- <br/><br/>Physics:  a conceptual approach/ Villegas, Arturo N.--  -- Metro Manila, Philippines:  Academe Publishing House  c1993 <br/>xii, 473 p.:  ill.;  23 cm. <br/><br/><label>ISBN: </label>971684039 <br/><br/><label>Dewey Class. No.: </label>Elem 530 V714 1993