Vandellberg, Drammen and Budsberg, Gudbrandsdalen

Hi All, I came across a book which gives some more information on the family of Martin Matson's wife, Minnie Peterson: http://www.ourroots.ca/page.aspx?id=3514445&qryID=a4a16e57-4fe0-48a4-936c-502ed8112d8d I am having trouble locating either of her parents' records. I know her father is Martin E. Peterson (spelled Peterson on his headstone and Pedersen in the 1900 US census) and that he was born July 17, 1851. From the book, I gleaned the information that his father's name is Peter Vandellberg (I am guessing this is a farm name?) and they are from Drammen. I cannot find any references to Vandellberg on the digital archives, so I am not sure the book has spelled the name correctly. Any alternative suggestions? In the book Minnie's mom is listed as Kristina Budsberg from Gudbrandsdalen. I did some research and found that Budsberg is a farm, yet I cannot find her on the census record in 1875. I guess it's possible her family was gone by then. I don't have a date of birth for Kristina, but I know that she passed away in 1895 in Creary, North Dakota. Does anyone have any other suggestions on how to find a record for Kristina? I don't know her parents names. Not sure what year the immigrated, but their only child, my great grandma Minnie was born in Minneapolis in 1882, so it would have been before that. I know that after Kristina died, Martin remarried Gunhild Thompson and they had three sons, Carl Theodor who died in infancy, Joseph Edwin (born in Minot, ND) and Theodore (born in Canada). Martin died in Claresholm, AB on December 13, 1907 and Gunhild moved with her sons to Paulsbo, Washington. I do have the records for Joseph's wife and family from that point on and know they ended up back in Claresholm, where they are buried. I am mainly trying to find the families for Martin and Kristina in Norway. Any help or suggestions would be greatly appreciated! Aili