1. Transportation system noise;Horonjeff,1970
2. E.P.A. Office of Noise Abatement and Control;Gatley;Regulation of noise in urban areas,1971
3. Community Noise Ratings;Schultz,1972
4. Córdoba takes noise abatement by the horns;Fuchs;The UNESCO Courier,1967
5. El Ruido Urbano. Contribución para su estudio en Rio de Janeiro;Palhano Pedrozo,1961