Folland, H. P · London : Institution of Aeronautical Engineers · leaf 6
SMITH’S AVIATION INSTRUMENTS … is fully catered for. Gloucestershire Mars i. Campbell Bennett Aperioiic Compass. S. Smith & Sons (M.A.) Ltd., Cricklewood Works, London, N.W.2. Cables: Speedofac, Lopdon. Phone: Willesd n 2335. Branches all over the world.
Airplanes
Internet Archive · University of Illinois Urbana-Champaign · Public domain (published before 1931). Free to use for anything.
