Saga of Cottonwood Farm

I am beginning my story of Cottonwood Farm - an autobiography of sorts. This is from the ND State Historical Society and will be included in a section on the first people to find Grand Forks County. I will be grateful for suggested sources to read and study.

First People
Before Euro-American settlement
of the Northern Plains began in the 19th Century, the land had been occupied for many centuries. Archeological investigations document the presence of big game hunting cultures after the retreat of the continental glaciers about 10,000 years ago and later settlements of both hunting and gathering and farming
peoples dating ca. 2000 B.C. to 1860. When the first white explorers arrived,
distinct Indian groups existed in what is now North Dakota.

These included the Dakota or Lakota nation (called "Sioux", or enemies by those who feared them), Assiniboine, Cheyenne, Mandan, Hidatsa, and Arikara. Groups of Chippewa (or Ojibway) moved into the northern Red River valley around 1800, and Cree, Blackfeet, and Crow frequented the western buffalo ranges.