Global Reporting Initiative+Reductions in energy requirements of products and services, GRI 302-5 (formerly G4-EN7)+ETB - Empresa de Telecomunicaciones de Bogota+2017+Source
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Global Reporting Initiative+Reductions in energy requirements of products and services, GRI 302-5 (formerly G4-EN7)+ETB - Empresa de Telecomunicaciones de Bogota+2017+Source