Microcomputer data communication systems - Derfler, Frank J. (Englewood Cliffs, N.J. : Prentice-Hall, 1982)
At cover: a guide to the operations of modems, terminals, electronic bulletin boards, and information utilities for users of TRS-80, Apple II, Heath-89, and other systems.
'A Spectrum Book'
Keywords: Data transmission systems; Microcomputers