I recently met Professor Lawrence Gross here at Montana State University in Bozeman Montana, and he teaches a course called "Native Food Systems." He used to teach at Iowa State, and he developed the curriculum based on the interest he received from many students there. He is Anishinaabe and from the White Earth Nation in Northern Minnesota, and he has an extensive knowledge of many of the horticultural practices of midwest tribes.
He has a very busy teaching schedule right now, but maybe he could recommend some good literature if you wrote him a nice email? He might share the titles of the books he uses for this class. You can find his email from this page: http://www.montana.edu/wwwnas/index.php?page=faculty
Good luck! This is something I'm interested in as well. Here in Bozeman, it's hard enough to imagine the buffalo coming back here to the Gallatin Valley, when they can't even leave Yellowstone Park without being slaughtered by the government! And I only live ~60 miles north of the Park, as the crow flies.