Region
United States
13
Nebraska
10
Oklahoma
7
California
5
Great Plains
4
Ponca Tribe of Indians of Oklahoma
4
Ponca Tribe of Nebraska
3
Grand Ronde Indian Reservation (Or.)
2
Ponca
2
Ponca Reservation (Neb.)
2
États-Unis
1
Grandes Plaines
1
Indian Territory
1
Indianer
1
Massachusetts
1
Mexico
1
Missouri River
1
South Dakota
1
United States, Nebraska
1
United States, Oklahoma
1
United States, South Dakota
1