The Signal Service in the European War of 1914-1918 (France)
by Raymond Edward Priestley.
From the Author....It has been the endeavour of the compiler of the following account of the activities of the British Signal Service during the European War of 1914 to 1918,to present as clearly as possible an understandable picture of the evolution of signal policy, orgaization and practice during these five years.
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http://www.archive.org/details/signalserviceine00prie
Joe