Originally prepared under the auspices of the Office of Naval Research. Second printing of a document first issued in 1953. Dark blue cloth-covered boards, gilt titles to front board and spine, 167 pages. Ex-library, from the Ministry of Supply (Great Britain). Condition: Boards rather bumped, library shelf mark to front board and to spine, library stamps and withdrawal stamps to front free endpaper, with name of subsequent owner. Pages clean and unmarked, with sound binding.