Technical records of explosives supply, 1915–1918. No. 1. Recovery of sulphuric and nitric acids from acids used in the manufacture of explosives: Denitration and ansorition. Pp. viii.+56. Minisry of Munitions and Department of Scientific and Industrial Research. (London: H. M. Stationery Office. 1920.) Prife 12s. 5d. net