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RE: st: AW: RE: AW: how to identify unique id variables within groups?
From
"Nick Cox" <[email protected]>
To
<[email protected]>
Subject
RE: st: AW: RE: AW: how to identify unique id variables within groups?
Date
Wed, 20 May 2009 16:33:58 +0100
Yes indeed. Ars longa, vita brevis.
Nick
[email protected]
Martin Weiss
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