Guide to Class of Service for Telegram Communication1938-05-26unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_047_1_5_45_0011The document provides a list of different classes of service for domestic cable telegrams, reminding patrons to specify the desired class or else the message will be transmitted as a full-rate communication. It then includes a telegram sent to Honorable Charles R. Gray on May 26, 1938, confirming the receipt of his letter dated May 20.