The method of numerical integration in exterior ballistics.
Ordnance textbook.
[By Dunham Jackson] Prepared in the Office of the Chief of Ordnance. October, 1919.

APA Citation

United States. Army. Ordnance Department. (1921). The method of numerical integration in exterior ballistics: Ordnance textbook. Washington: Govt. Print. Off..

MLA Citation

United States. Army. Ordnance Department. The Method of Numerical Integration In Exterior Ballistics: Ordnance Textbook. Washington: Govt. Print. Off., 1921.

Warning: These citations may not always be complete (especially for serials).