Look up death dates in Norway

Hi I'm looking for the death dates of Nils Peter Karlsen b 1855, in Aafjord, Norway. He came to the U.S. 2 times, I don't know the dates. Family rumor dates his death in 1943? Also his wife, Peteronella Petersdatter b 1849 in Bessaker, Norway. They had my gfather Albert Cornelis Carlson b Aug. 3, 1879 in Bessaker, Norway. He came over to stay in 1906, to Drummond, WI. His wife was Lena Kristine Jakobsdatter, b in Hopstad. She came to the u.s. in 1907. All help is greatly appreciated Bonnie