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- 87402843 contributor B5549719.
- 87402843 created "c1987.".
- 87402843 date "1987".
- 87402843 date "c1987.".
- 87402843 dateCopyrighted "c1987.".
- 87402843 extent "iv, 102 p. :".
- 87402843 isPartOf "Communications Systems & Services (Series)".
- 87402843 isPartOf "Communications Systems & Services".
- 87402843 issued "1987".
- 87402843 issued "c1987.".
- 87402843 language "eng".
- 87402843 publisher "Boston, MA (200 Portland St., Boston 02114) : Yankee Group,".
- 87402843 spatial "United States".
- 87402843 spatial "United States.".
- 87402843 subject "381/.45621385 19".
- 87402843 subject "HE8817 .I57 1987".
- 87402843 subject "Market surveys United States.".
- 87402843 subject "Telephone United States Private branch exchanges.".
- 87402843 subject "Telephone United States.".
- 87402843 title "Integrated voice/data PBXs / Communications/Information Systems.".
- 87402843 type "text".