TY - BOOK AU - TI - Electronic communications: a step-by-step introduction PY - 1983/// CY - Englewood Cliffs, N.J. PB - Prentice-Hall KW - Radio N1 - 'Spectrum book.'; Reproduces the text of the ed. published: Benton Harbor, Mich. : Heath Co., c1981; unit objectives and self-reviews omitted; Includes index ER -