American Public Health Association
Chicago Single Payer Action Network
Commonwealth Fund
Families USA - The Voice for Healthcare Consumers
Guaranteed Health Care
Guaranteed Healthcare for All
Healthcare for America Now
Healthcare-Now
Illinois Single Payer Coalition
Kaiser - congressman john lewis (D-GA) at the 2007 AMSA national convention
People's Health Movement - Health for All, Now!
Physicians for a National Health Program
Single Payer Action - everybody in. nobody out.
The Hasting's Center
The Library of Congress -- Thomas