The United Nations is a major player and its role and relationship with Indigenous peoples is the subject of a separate page in this guide.
The current/most recently received editions of books with shelf marks beginning Internat are on Level 3 of the Law Library. Previous, superseded editions have (sec coll) added to the end of their shelf marks, and are relocated to the Ground Floor where they remain accessible to readers.
Indigenous Peoples' Status in the International Legal System by 
Reparations for Indigenous Peoples: international & comparative perspectives by 
Chagos Islanders and International Law by 
Protection of the Roma Minority under International and European Law by