The Law Library of Congress collection contains a variety of American Indian legal materials. The Law Library holds most of the laws and constitutions from the early nineteenth century produced by the Cherokee, Choctaw, Chickasaw, Creek, and Seminole who were forced to leave the Southeast for the Indian Territory after passage of the Indian Removal Act in 1830. Some of these documents are in the vernacular languages of the tribes.
From Oklahoma State University Library, a digitized version of Charles J. Kappler's seven volume compilation of U.S. treaties, laws and executive orders pertaining to Native American Indian tribes from the U.S. Statutes at Large