AW: st: AW: RE: AW: how to identify unique id variables within groups?

From	"Martin Weiss" <[email protected]>
To	<[email protected]>
Subject	AW: st: AW: RE: AW: how to identify unique id variables within groups?
Date	Wed, 20 May 2009 16:50:33 +0200

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Follow-Ups:
- RE: st: AW: RE: AW: how to identify unique id variables within groups?
  - From: "Nick Cox" <[email protected]>

References:
- st: how to identify unique id variables within groups?
  - From: Jia Xiangping <[email protected]>
- st: AW: how to identify unique id variables within groups?
  - From: "Martin Weiss" <[email protected]>
- st: RE: AW: how to identify unique id variables within groups?
  - From: "Nick Cox" <[email protected]>
- st: AW: RE: AW: how to identify unique id variables within groups?
  - From: "Martin Weiss" <[email protected]>
- Re: st: AW: RE: AW: how to identify unique id variables within groups?
  - From: Jeph Herrin <[email protected]>