There are currently an estimated 15,000 American Indians living in Iowa.
American Indian treaties: a guide to ratified and unratified colonial, United States, state, foreign, and intertribal treaties and agreements, 1607-1911 (Main KIE 19 .D45 2015)
American Indian treaties : the history of a political anomaly. by Francis Paul Prucha. (Main KF8205 .P75 1994)
Documents of American Indian diplomacy : treaties, agreements, and conventions, 1775-1979 / [compiled by] Vine Deloria, Jr., and Raymond J. DeMallie ; with a foreword by Daniel K. Inouye. (Main Oversize (FOLIO KF8202 1999)