Sniper : a history of the US marksman / Martin Pegler marine corps museum monograph series U.S. Marine Corps Marksmanship Badges from 1912 to the present / by Michael D. Visconage new drill regulations United States army (FM 22-5, leadership, courtesy, and drill, febrary 1946) including marksmanship caliber .30MI rifle, caliber .30 M1903 rifle (Springfield), caliber … training regulations Cavalry : armored-car marksmanship / prep. under direction of the Chief of Cavalry - United States War Department Training Regulations TR 425-90
