41. Technical regulations. 1410-128. Ordnance Department: Instructions for ordnance maintenance companies, 75-mm. gun and carriage, models of 1697 and 1897 M1 (French), prepared under direction of chief of ordnance; July 31, 1925. Bookmark Corporate/Agency Authors: War Department Publisher: War Department Date: [1925.] SuDoc number: W 1.22:1410-126
42. Technical regulations. 1440-65. Air Service: The airplane, prepared under direction of chief of Air Service; July 10, 1925. Bookmark Corporate/Agency Authors: War Department Publisher: War Department Date: [1925.] SuDoc number: W 1.22:1440-65