Peschkes, Robert. 1993. "World Gazetteer of Tram, Trolleybus, and Rapid Transit Systems, Part Three: Europe" (ISBN 0-948619-01-5). London: Rapid Transit Publications.
Trolleybus Magazine (ISSN 0266-7452). National Trolleybus Association (UK). Bimonthly.
References
^ abcdefghijklmnopqrstuvwxyzaaMurray, Alan (2000). World Trolleybus Encyclopaedia. Yateley, Hampshire, UK: Trolleybooks. pp. 25, 26, 72. ISBN 0-904235-18-1.
^ abIsgar, Carl F. (September–October 2014). "Pontevedra Trolleybuses". Trolleybus Magazine. No. 317. UK: National Trolleybus Association. pp. 117–123. ISSN0266-7452.
^ abTrolleybus Magazine No. 275 (September–October 2007), p. 117. National Trolleybus Association (UK). ISSN0266-7452.
^Haseldine, Peter (September–October 2008). "Trolleybuses Return to Spain". Trolleybus Magazine. No. 281. UK: National Trolleybus Association. pp. 97–100. ISSN0266-7452.