For Artillery Officers (1911) Fire Control Fundamentals, NAVPERS 91900 (1953), Part C: The Projectile in Flight - Exterior Ballistics FM 6-40, Tactics, Techniques, and Procedures for Field Artillery Manual Cannon Gunnery (23 April 1996), Chapter 3 - Ballistics; Marine Corps Warfighting Publication No. 3-1.6.19 FM 23-91, Mortar Gunnery (1 March 2000), Chapter 2 Fundamentals of Mortar Gunnery Fundamentals of Naval Weapons Systems: Chapter 19 (Weapons and Systems Engineering Department United States Naval Academy) Naval Ordnance and Gunnery (Vol.1 - Naval Ordnance) NAVPERS 10797-A (1957) Naval Ordnance and Gunnery (Vol.2 - Fire Control) NAVPERS 10798-A (1957) Naval Ordnance and Gunnery Ballistics Angle