This technical guide, titled "Weber Carburettors 1 Theory" by John Passini, offers valuable insights into the inner workings of carburettors. Published in 1971 by Speed and Sports, this guide is a must-have for anyone interested in the mechanics of carburettors. The guide covers various aspects of carburettors, including their history, design, and function. An essential reference for car enthusiasts and mechanics alike. Whether you're looking to improve your car's performance or simply want to learn more about carburettors, this guide is an excellent resource.