C A Zafra Global citimpact: 0.82 Researcher at Facultad del Medio Ambiente y Recursos Naturales, IngenierÃa Ambiental, Universidad Distrital F.J.C., Avda. Circunvalar Venado de Oro, Bogotá D.C., . Profile Groups Memberships Order By: Last Active Most Members Newly Created Alphabetical