If you Contact Barbara Behrend, firstname.lastname@example.org
she will assist you will research at the Brookings Library.
She is a really great person and very helpful. She found an obit for me from Microfilm and even went to the clerks office to see if any further info on the person was available. After sending me the obit she did further research and found a photo of the person I was looking for and sent a copy to me.
I believe she is a libray employee but does do genealogy lookups for those trying to find info on persons from Brookings County, SD.