Family records. Marriage is recorded in Marion, IN, Book 120, Pg 365.
1930 Federal census for Marion Co., Indianapolis, Indiana shows Calvin Rothenbush, age 27 years (born in Ohio as were both parents and both grandparents)), living with his parents Benjamin and Mamie. His brother Walter H. also lives in the household. The value of Benjamin's home in this census was $5,000 and was not a farm. Benjamin and Mamie are listed as salespersons in a hardware store (possibly owned it?), and both Calvin and Walter are listed as drugstore salesmen.