Descript |
volumes : illustrations ; 31 cm |
Frequency |
Weekly, except semiweekly the first week in July, <1989-> |
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Frequency varies, 1901-<Jan. 1983> |
Pub Date |
Began with: Vol. 225, issue 1 (July 5, 1993). |
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Ceased with: vol. 250, issue 7 (July/Aug. 2009). |
Note |
Beginning in 1990 one issue per month called: Global telephony. |
|
Imprint varies. |
|
Volume numbering irregular: v. 20-58 omitted in numbering. |
ISSN |
0040-2656 |
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