1997 Alphabetically arranged essays, most detailing specific issues, persons, organizations, or laws. Longer, signed essays carry bibliographies. Appendices at the end of the third volume list pertinent court cases, a glossary, and a bibliography. There is an index of court cases, a list of entries by category, and a subject index. Gives technical as well as general definitions.
Some entries carry references, and a few are signed.
Arranged alphabetically by topic with source name and subject index appended. Signed, topical entries with bibliographies. Although there are some individual profiles, in general, biographies of leading figures are not included. An index is appended. 1989 Signed entries define, summarize, and explain the history, present state, and future outlook of the field of communications.