00380nam a2200109   4500082002300000100001900023245010500042260004700147300003300194650002100227700002200248  aFil. 500 P281 19741 aPascual, Elena1 aGeneral science for the changing world :bfor first year /cby Elena Pascual [and] Adela S. de Leon.  aManila :bPhilippine Book Company,cc1974.  a191 p. :bsome ill. ; 26 cm.14aGeneral Science.1 ade Leon, Adela S.