Black, Uyless D. The X series recommendations standards for data communications Uyless D. Black - 2nd ed. - New York McGraw-Hill 1995 - xvii+333p. illus;fig;appdx;index ISBN: 0-07-005593-9 Subjects--Topical Terms: Computer Network ProtocolsComputers InterfacesData Transmission Systems Universal Decimal Class. No.: 681.3.01/.02 / UYL