Heading Format for Data Transmission (A USAAI Tutorial -- Standards) CACM June, 1968 data transmission heading format, heading format, message format, data transmission, message headings 3.57 3.81 6.39 CA680609 JB February 22, 1978 4:07 PM 1736 5 1736 1736 5 1736 1736 5 1736