"This 1939 manual prescribes the duties to be performed in the service of the piece by the personnel normally assigned to one gun section of the firing battery."
Field artillery field manual (1940) which contains reference data of special value to field artillery personnel in the theater of operations, or references to authorized training literature containing these data.
These 1942 lessons were prepared under the direction of the Commanding General, Field Artillery Replacement Training Center, Fort Sill and prescribed for use as an aid to training.