Audel's Diesel Engine Manual Q&A Black Cover, Antique book, 6 pages Table of Contents, 554 pages, illustrated. A clean, unmarked and solid copy which appears untouched. Full title: "Audel's Diesel engine manual : questions, answers, illustrations : a practical concise treatise on the theory, practical operation and maintenance of modern automotive-marine locomotive and stationary diesel engines, including many other modern applications" First published in 1936. See my many other interesting  books in my e-bay store,