"The Tribal Treaties Database provides an easy-to-use portal to access treaties, agreements, and other historical documents that have shaped relationships between tribal nations and the United States. These treaties represent pivotal moments in history where rights were negotiated, promises made, and the course of lives and nations forever altered."

An online research guide to treaty resources and sites, with a focus on treaty law, from the University Libraries at the University of Oklahoma.

"The Indian Law Resource Center is a non-profit law and advocacy organization established and directed by American Indians. We provide legal assistance to Indian and Alaska Native nations who are working to protect their lands, resources, human rights, environment and cultural heritage. ... The Center provides legal assistance to indigenous peoples of the Americas to combat racism and oppression, to protect their lands and environment, to protect their cultures and ways of life, to achieve sustainable economic development and genuine self-government, and to realize their other human rights."

"Indian Affairs provides services directly or through contracts, grants, or compacts to 574 Federally recognized tribes with a service population of approximately 2.5 million American Indian and Alaska Natives."

Search the catalog of the National Archives. Refine results by "available online" to see digital documents and images.

"This page provides information regarding the definition of Indian country ... This information may help you determine if a particular parcel of land is Indian country. Please note that this page provides general guidance only. Specific situations for individual parcels of land may present unique issues."