Inger Hermina Johansdatter's records are available on microfilm from the parish of Brønnøy, subparish called Sømna (probably the local church).
You can go to the local LDS church research center, and request the microfilm, or look at it here for her time frame.http://www.arkivverket.no/URN:kb_read?idx_id=16528
1815 - 1837
Her birthdate is at familysearch.org based on those records, and that her parents are Johan Nielsen and Anne Hansdatter.
07 SEP 1834 Somna, Nordland, Norway
Her parent's marriage is there also,
03 JAN 1819 Somna, Nordland, Norway