Christenson of Ada Minn was the photographer. I found out it was R C Christenson and he was in business there in 1918.
Rosa Madona Merth
The postcard itself is an AZO that was used from 1904-1918.
Thanks for stopping by.
Update from Phryxe:
Rose Madonna Merth Christensen Born Jan 10 1915 in Minnesota Died June 18, 1989 in Washington. Buried in Wall Walla WA. Her mother was Lena Merth. She had many siblings; June, Marie,Shirley,Nadine,Joe and Victor.
Rose's husband was Jerald E Christensen They had at least three children Ruth, Helen and Bob. Rose and her husband were missionaries.