11. Ordnance provision system. [Ordnance catalog (ordnance provision system): Group P], Ammunition instruction material for harbor defense, heavy field, and railway artillery, Changes 2; Jan. 1, 1937. Bookmark Corporate/Agency Authors: Ordnance Department and Finance Department Publisher: Ordnance Department Date: [1936.] SuDoc number: W 34.23:P-7/4/ch.2