Committee 8 Officers Advanced Course, The Armored School; Himes, Cecil; Krampitz, Charles T.; Heffelfinger, Hugo W.; Falls, Carroll M., Jr.; Stout, Morris C.; Boehmer, William J.; Plume, Stephen K.; Styer, George D.; Huddleston, James M.
"This 1942 manual is published for the information and guidance of personnel using the 20mm aircraft gun materiel M1 and M2 and contains technical information requried in the identification, use, and care of the materiel."
"Since the invention of gunpowder, fortification has received various improvements, and many have been the books wrote upon this subject, which might incline one to think, that it was arrived to its utmost perfection. . . "