I am seeking information about the siblings of my father, Wilmer Nickelson born in 1920 to Mattie Gardine/Howard, and Coleman (Bud) Nickelson. My father had some other siblings that we have never met. I was told that he had a sister named Gladys and that is all I know. The last time we heard from Mattie was in February of 1962. Seeking any information that I can find on Mattie and Coleman families.