2 1 10 Araoz, Luis Fernando Additional Author Sabsay, Daniel Alberto Additional Author Casullo, Alicia Beatriz Additional Author Jauregui, Anibal Pablo Additional Author Jauregui, Silvia Georgina Additional Author mixed material 9504601111 Buenos Aires Santillana 1989 Merega, Herminia Additional Author Pavicich, Monica Beatriz Luisa Additional Author Araoz, Luis Fernando Additional Author Galante , Andrea Silvia Additional Author Sassone, Susana Maria Additional Author mixed material 9504601693 Buenos Aires Santillana 1992.