Family from Ringsaker to America - 1873

Searching for information on Eline Johnson Flotlien, b. 05 Jul 1863 in Ringsaker, Norway. She emigrated with her family in 1873 and arrived to Iowa and then four years later moved to Minnesota. Her father's name was Lars. Children to Eline were: Martin, Alma, Pauline, Lottie, Edwin, Elmer, Oscar, Edward, Arnold, and Alvin. I know more about her in the U.S. but cannot find the information on her parents or her Norwegian roots. Please help! Thanks.