Area de ciudades dedicada a la vialidad
Por stefan steiniger
Vasconcellos, Eduardo A. (2001), Urban Transport, Environment and Equity - the case for developing countries, Earthscan, UK, table 2.1, página 12.
Vasconcellos, Eduardo A. (2001), Urban Transport, Environment and Equity - the case for developing countries, Earthscan, UK, table 2.1, página 12.