↑https://ancestry.com - World War I Draft Card - 1917-1918, Yellow Medicine, Minnesota - Frank Adler - Build: Medium, Height: Medium, Hair Color: Brown, Eye Color: Blue, married.
↑https://ancestry.com - 1920 US Federal Census filed in Echo, Yellow Medicine, Minnesota, USA Lists - Frank Adler: 26 years old, husband/father, Occupation: Laborer working on road; Irene Adler: 24 years old, wife/mother; Marian Adler: 4 years old, daughter; Harriet Adler: 2 years old, daughter.
↑https://ancestry.com - 1930 US Federal Census filed in Neenah, Winnebago, Wisconsin, USA Lists - Frank Adler: 37 years old, husband/father, Occupation: Laborer at Paper Company; Irene Adler: 35 years old, wife/mother; Marian Adler: 14 years old, daughter; Harriet Adler: 11 years old, daughter; Jeanette Adler: 9 years old, daughter; Lois Adler: 7 years old, daughter.
↑https://ancestry.com - 1940 US Federal Census filed in Neenah, Winnebago, Wisconsin, USA Lists - Frank Adler: 46 years old, husband/father, Occupation: Paper Manufacturing Company; Irene Adler: 45 years old, wife/mother; Harriet Adler: 21 years old, daughter, Occupation: Doctor's Assistant; Jeanette Adler: 19 years old, daughter, Occupation: Servant in Home; Lois Adler: 17 years old, daughter; Frances Adler: 9 years old, daughter.
↑https://ancestry.com - World War II Draft Card - 142, Neenah, Wisconsin - Frank Ludwig Adler - Eye Color: Blue, Hair Color: Brown, Height: 5'9", Weight: 179 lbs, Complexion: Light, Next of Kin: Irene Adler (Wife)