They were married at the home of my grandmother's brother, Elmer Carl Ragnar Anderson and the reception was held at the home of her parents.
Last year I had some home movies digitized which included their wedding reception.
This year I was able to confirm, with the help of a cousin, that my grandmother's maid of honor was the sister of her brother's wife. Dagmar C. Peterson is the sister of Anna Elizabeth Peterson who married Axel Heinrich Waldemar Anderson.
I was also able to confirm that I had correctly identified her in some later family photos, like this one from my grandmother's 75th birthday.
Who will I identify this year? Stay tuned.