Erdos & Morgan	Synovate (EMS)
Ipsos MORI	Synovate (PAX)
Ipsos Mendelsohn	TGI Latina
J.D. Power & Associates	Teenage Research Unlimited
MARS	The Gallup Organization
Mediamark Research	The Media Audit
Nielsen	Touchpoints (IPA)
Proprietary	UK National Readership Survey (NRS)
Scarborough Research	UK Target Group Index (TGI)
Simmons