"These wartime guides are an invaluable description of, and finding aid for, the general mapping situation and map series in use in various theatres in World War 2. Armed with the information they contain, the historian or researcher can, if required, seek appropriate series and sheets in the various archives and map libraries in which these maps may now be found such as The National Archives, The British Library, The Imperial War Museum, The Royal Geographical Society and University Libraries.

To this end, the Defence Surveyors’ Association has included scanned versions of all four guides on the web site to assist researchers who may not otherwise have access to these publications."