I checked their marriage license in FamilySearch but no parents are on it or where she was from in Norway.
Bessie H. "Betsy" Ellingson Craver
Born: Dec 1866, Norway
Died: 24 Sept 1926, Beltrami Co. MN
Buried: Greenwood Cemetery, Bermidji, Beltrami, MN
I'd contact the Beltrami Historical Society, http://beltramihistory.org/research/
and ask ab out a copy/scan of her obituary. Where she was born and her parents names might be on it.
You can order a non-certified copy of her death certificate from the Office Vital Records, www.health.state.mn.us/divs/chs/oscr
. If the Informant knew that info, it will be on her death cert. Successful Searching!