Peschkes, Robert. 1980. World Gazetteer of Tram, Trolleybus, and Rapid Transit Systems - Part One, Latin America (
ISBN1-898319-02-2). Exeter, UK: Quail Map Company.
Trolleybus Magazine (ISSN 0266-7452). National Trolleybus Association (UK). Bimonthly.
Peschkes, Robert. 1980. World Gazetteer of Tram, Trolleybus, and Rapid Transit Systems - Part One, Latin America (
ISBN1-898319-02-2). Exeter, UK: Quail Map Company.
Trolleybus Magazine (ISSN 0266-7452). National Trolleybus Association (UK). Bimonthly.