I received the following response from my emailed query to IW:

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With regards to the volume numbering of IndustryWeek Magazine, the Dec
2001/Jan 2002 issue is the last issue in the 2001 volume (Volume 250,
Number 15), and Feb 2002 issue is the first issue in the 2002 volume
(Volume 251, Number 2) There is no Volume 251, Number 1 issue.

The Jan 16th article is a Web exclusive article which did not appear in the
print version of IndustryWeek magazine.
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Jeanette L. Skwor
Serials Dept.
Cofrin Library
University of Wisconsin - Green Bay
Green Bay, WI 54311-7001
(920) 465-2670
<skworj@UWGB.EDU>