National Congress of American Indians, http://www.ncai.org/index.asp

"The National Congress of American Indians was founded in 1944 and is the oldest and largest tribal government organization in the United States. NCAI serves as a forum for consensus-based policy development among its membership of over 250 tribal governments from every region of the country."

The website features

• resolutions adopted during annual and mid-year meetings, from 2000 to date
• a calendar of events, meetings, and relevant Congressional committee hearings and meetings
• a tribal directory covering tribes, association, and government agencies
• documents on and links to other websites dealing with issues such as community development, governance, human resources, and natural resources.