American Train Dispatchers Association

• Constitution and by-laws of the American Train Dispatchers Association ... as amended by the Sixteenth General Assembly held in Chicago, Ill., October 12-15, 1953
• Constitution and by-laws of the American Train Dispatchers Association ... as amended by the Tenth General Assembly held in Chicago, Ill., July 22-25, 1935
• Constitution and by-laws of the American Train Dispatchers Association ... as amended in the Eighth General Assembly held in Chicago, Ill., July 22-25, 1929
• Four tricks a day