BIBLIOGRAPHY
The following list of books, pamphlets and articles bearing on the evolution and the development of rail-power down to the outbreak of the Great War in 1914—this alone being the purpose and the scope of the present work—was originally based on selections from a "List of References on the Use of Railroads in War" prepared by the Bureau of Railway Economics, Washington, D.C., U.S.A., and including items from all the leading libraries of the United States (Library of Congress; the libraries of the principal Universities, Colleges and learned or technical societies; State libraries, public libraries, private railway-libraries, and the library of the Bureau itself), together with various foreign libraries, such as those of the Minister of Public Works in Berlin, the International Railway Congress at Berne, and others besides.
Much valuable help has been derived from the American list; but a large number of its references, and especially those relating to the World-War itself, have not here been reproduced, while so many additions have been gathered in from other sources among which might be mentioned the published catalogue of the War Office Library; the libraries of the British Museum, the Royal Colonial Institute, and the Patent Office; the Journal of the Royal United Service Institution, the publications of the Royal Engineers' Institute, and official or other publications in Great Britain, France, etc., that the Bibliography here presented may, perhaps, be regarded as practically a new compilation, supplementing the excellent purpose which the list of the American Bureau of Railway Economics will undoubtedly serve.