History of two broad gauge railways in the Bilbao area with focus on their locomotives and rolling stock. The Triano line was opened in 1865, the Portugalete line in 1888 and electrified at 1500 V in 1933. The Triano line was electrified in 1944-1953 after being taken over by the RENFE. 96 pages 27x21 cm, line drawings, b&w photographs, sb.