"The Evolution of Locomotive Valve Gears" by T. H. Shields, published in 1999, is a comprehensive exploration of the intricate and complex systems used to control the power and movement of locomotives. This book delves into the history, design, and functionality of locomotive valve gears, providing valuable insights for collectors, enthusiasts, and professionals in the transportation industry. With detailed explanations and expert analysis, this book offers a deep dive into the evolution of these critical components over the past century, making it a must-have for anyone interested in railroadiana and trains."

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The Evolution of Locomotive Valve Gears by T. H. Shields 1999 paperback. 
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