| 2021-04-21 | Plains tribe members |
| 2020-02-08 | Plains people |
| 2019-03-12 | Some Siouans |
| 2017-05-09 | Plains tribe members |
| 2016-12-10 | Plains tribe |
| 2016-10-07 | Some Siouans |
| 2015-09-08 | Midwest tribe |
| 2015-08-15 | Relatives of Winnebagos |
| 2013-11-27 | Plains Indians |
| 2013-05-29 | Oklahoma tribesmen |
| 2012-09-08 | Little Thief's people |
| 2011-06-02 | Buffalo-hunting Indians |
| 2011-05-24 | Chief Whitehorse and tribesmen |
| 2011-01-10 | Siouan people |
| 2010-09-28 | Western tribe |
| 2010-08-30 | Plains tribe |
| 2010-01-27 | Platte River people |
| 2010-01-13 | Plains Indians |
| 2009-07-17 | People of the Platte, once |
| 2009-05-13 | Siouan speakers |
| 2009-04-10 | Platte River tribe |
| 2009-02-15 | Dwellers along the Platte, once |
| 2008-10-19 | Siouan people |
| 2008-03-23 | Western tribe |
| 2008-02-08 | Natives of Noble County, Okla. |
| 2005-09-17 | Former Platte River dwellers |
| 2004-12-12 | Early Nebraskans |
| 2004-10-15 | People of the Platte |
| 2004-04-23 | Platte River people |
| 2002-10-31 | Part of the Winnebago nation |
| 2002-10-16 | Siouan people |
| 2002-10-13 | People on the Platte |
| 2002-08-25 | Platte River tribe |
| 2002-02-19 | Platte River people |
| 2001-11-11 | Oklahoma tribe |
| 2001-09-05 | Nebraska natives |
| 2000-12-22 | Former Platte River inhabitants |
| 2000-07-02 | Platte River tribe |
| 1998-08-14 | Native Oklahomans |
| 1998-03-03 | Western Indians |
| 1997-12-30 | Western Indians |
| 1994-01-02 | Siouan Indians |