Great Plains Province (U.S. National Park Service)

Protecting Bison - Bison (U.S. National Park Service)

Parks that Celebrate Native American Heritage

Great Plains The Nature Conservancy

Recreation and Tourism U.S. Climate Resilience Toolkit

Great Plains State Park

Does any flat land between two hills/mountains constitute a valley? - Quora

Where the Bison Could Roam - The New York Times

Center for Great Plains Studies

Bringing back bison is an environmental boon — and a logistical mess