British Standard Specification for Goliath Lamp Caps and Lamp Holders for Currents Up to 15 Amperes or Powers Up to 1000 Watts (Paperback) - For Pressures Not Exceeding 250 Volts When the Containing Case Is of Metal Only, or for Pressures Not Exceeding 650 Volts When
British Standard Specifications for Railway Rolling Stock Material, Vol. 2: Locomotive, Carriage and Wagon Tyres; Revised December, 1911 (Classic Repr (Paperback)